Top 30 Stars You Forgot Appeared on Grey's Anatomy

Many TV viewers first saw this actor in a notable role on “Pretty Little Liars.” He notably followed it up with another recurring part on “Teen Wolf” before making it big with “All American.” Before featuring as a TV regular though, Christian appeared in a guest spot on “Grey’s Anatomy.” The then-teenage performer played Brad Walker, a patient with unexplainable abdominal pain. The character gets a lot of grief from his parents, who are convinced he’s faking it. As it turns out, though, Brad’s condition is anything but make-believe. The episode’s tone quickly shifts to grim as his life hangs in the balance. Thankfully, Alex Karev and company help the boy pull through.

This long-time TV actress has an impressive list of credits stretching back to her youth. Of course, most know her from her days as Darlene Conner on “Roseanne,” a role she reprised for the follow-up series “The Conners.” Gilbert is no stranger to medical dramas either, having appeared in “ER” and “Grey’s” spin-off “Private Practice” in a different role. In the flagship series, she played Kim Allen, a patient with terminal cancer. In an episode dealing with highly sensitive subject matter, Kim requests physician assistance to end her life. The topic is handled with care and grace, as the story deals with the ethics behind this decision. Gilbert’s performance goes a long way in asserting that her talents aren’t limited to the realm of comedy.

Josh Radnor is most famous for playing Ted Mosby on “How I Met Your Mother,” where he engaged in “Classic Schmosby” behavior for nine years. He’s also written and directed critically praised films like “Liberal Arts.” In 2018, after starring in the musical drama “Rise,” Radnor made an appearance on “Grey’s.” While many guest stars tend to be patients, Radnor never steps foot in the hospital. His character, John, meets Meredith for a blind date. Things are set up like a rom-com meet-cute, as the pair realize they were supposed to meet different people. Unfortunately, he blows it after saying the worst thing he could, ending any chance of a romance. It looks like his “Schmosby” antics go far beyond “How I Met Your Mother.”

Metcalf is acting royalty. Along with an Oscar nomination for “Lady Bird,” she’s bagged multiple Emmy noms for her work in “Roseanne,” “The Big Bang Theory,” “Hacks,” and many others. Whether it’s through comedy or drama, she knows how to tug at our heartstrings. She does just that as Beatrice Carver on “Grey’s Anatomy.” Beatrice has terminal cancer, but keeps her daughter shielded from her condition. Despite the doctors’ best efforts, the character isn’t long for this world. In a scene that demonstrates Metcalf’s skills as a performer, Beatrice reveals the truth to her daughter, making us bawl. And while Metcalf has quite a few Emmys to her name, it’s a shame she didn’t snag one for this role.

You might know her as a child actor from projects like “Independence Day” and “Friends,” or as a young adult in shows like “Arrested Development” and “Parenthood.” You might even recall her voice as Katara in “Avatar: The Last Airbender.” Whatever the medium, Mae Whitman has a pretty long resume, which is why her appearance on “Grey’s Anatomy” goes overlooked. The actress plays teenager Heather Douglas, a patient with advanced scoliosis that impacts her ability to walk. Although the character’s been through a lot, she puts up a defiant and determined attitude. This wins Izzie’s sympathy, who anonymously provides a generous donation that makes Heather’s dream come true. Given the show’s track record, it’s an unusually heartwarming conclusion – not that we’re complaining.

After receiving her big break as a young actress on the sitcom “Who’s the Boss?,” Alyssa Milano transitioned to more mature roles. Her most famous turn remains in the hit fantasy “Charmed,” playing fan-favorite Phoebe Halliwell. In 2019, “Grey’s” got Milano on board, alongside her “Charmed” co-star, Holly Marie Combs. The actresses again play sisters, although these are of the bickering sort. They arrive at the hospital after their younger sister Heather experiences a tragic accident. The pair spends the episode debating her life support until coming to a decision. But as luck would have it, the patient wasn’t their sister to begin with. Even over a decade since “Charmed,” Milano and Combs’ onscreen chemistry shines through.

For years, Burton Morgan played with fans’ hearts as part of the Lucas/Peyton super couple on “One Tree Hill.” She’s also known as insurance investigator Sara Ellis, sharing some steamy chemistry with Matt Bomer’s con artist in “White Collar.” After her tenures on both shows, she showed up for a divisive arc on “Grey’s Anatomy.” She plays Dr. Lauren Boswell, a character who puts the nail in the coffin for Callie and Arizona’s marriage. As soon as they meet, she makes her interest in Arizona clear. With her and Callie on the rocks, Arizona gives in to her attraction to Lauren. Although Burton Morgan’s character only appears for three episodes, the ramifications of her presence remain for the entirety of Callie and Arizona’s relationship.

When you’ve got a softball game in your neighborhood – who you gonna call? That’s right, Ernie Hudson. The actor made it big as Winston Zeddemore in “Ghostbusters” franchise, even reprising this part in 2021’s “Ghostbusters: Afterlife.” Naturally, he kept the character fresh for modern audiences. In between, Hudson ventured into the “Grey’s Anatomy” universe, appearing as a surgeon from a rival hospital. Brad McDougall spends his time onscreen mocking the doctors from Seattle Grace Mercy West. The character’s competitiveness gets out of hand, as he keeps trying to rile up his opponents. It’s a far cry from the likable Winston that fans are used to, but also demonstrates Hudson’s range as an actor.

This actress has an extensive list of credits, including movies like “Sky High,” “Friday the 13th,” and the HBO miniseries “Empire Falls.” But she’s best known for playing Caitlin Snow on “The Flash,” a part that cemented her as a fixture in comic book fandom. Years before her star-making role, she stopped by Seattle Grace Mercy West. Her character, Kelsey, poses a challenge for the doctors. Due to a failed transplant, Kelsey operates without a heart. With things looking dire, she tries to spend her final hours experiencing the joys of life. Fortunately, a last-minute organ comes to the rescue. Although it’s a one-off appearance, the medical case of Panabaker’s character remains among the most unique that “Grey’s Anatomy” has tackled.

If you grew up during “Wizards of Waverly Place”’s time on air, you probably still see David DeLuise as everyone’s favorite TV dad. Animation fans might also recognize him as the voice of Coop from the sci-fi series “Megas XLR.” DeLuise plays the similarly happy-go-lucky Charlie Connor on "Grey's." The character’s ailment doesn’t need any explanation, given that he’s missing part of his skull! Despite a freak accident, Charlie remains upbeat and fascinated with his upcoming surgery. DeLuise channels some of his “Wizards” optimism in the role, making Charlie one of the more likable guest characters in the series.

One year into her run on the show “Switched at Birth” Vanessa made a guest appearance on Grey’s Anatomy. In the season 8 episode, “The Girl with No Name,” Marano played Holly Wheeler. Holly was brought to the hospital after being found injured in a ravine. During the episode, we discover that Holly was a girl in a famous case of kidnapping some time ago. Super Shonda Rhimes fans might remember that Marano has also made appearances on “Private Practice” and “Station 19.” And although all three shows are in the same universe, Vanessa has played a different character on each show. Not that that bugs us or anything!

Eight years before he won his Tony award for his portrayal of Aaron Burr in the Broadway mega-hit “Hamilton,” Odom Jr. made a guest appearance on “Grey’s Anatomy.” In the season 5 episode, “There’s No “I” in Team,” Leslie played P.J. Walling, a young man who was offered $10,000 to donate his kidney by his father who was in chronic renal failure. He had done some TV work prior to his appearance on the show, with multiple episodes of “CSI: Miami” under his belt, among others. But he wasn’t the recognizable star he is now, all thanks to “Hamilton.”

If you thought being the coach of a high school football team in Texas was a tough job, try being a member of the Seattle Police Department Bomb Squad. While having clear eyes and full hearts worked out well for Kyle on “Friday Night Lights,” things didn’t go quite as well for his character, Dylan Young on “Grey’s.” We don’t want to spoil anything for those who might just be getting into the show now. But we can say that Dylan is still one of the medical drama’s most memorable characters, even though he appeared way back in season 2!

Unlike some of the folks on this list who became famous in the years after their appearance on the show, Campbell was at the height of her stardom when she did her episodes. Twelve years after “Party of Five” ended and one year after the release of “Scream 4,” Neve appeared in two episodes in season nine. She played Dr. Lizzie Shepherd, sister of the great Dr. Derek Shepherd. Fans will definitely remember Derek’s other sister, Amelia who had a much larger role on the show, but many may have forgotten about Lizzie, who is also a doctor. Sounds like it runs in the family!

Before you saw him in “High School Musical: The Musical - The Series'' on Disney+, you might have seen Bassett in the Disney show, “Stuck in the Middle” where he appeared in nine episodes. However, in the time between his work with the Mouse House, he did a two episode stint on “Grey's Anatomy.” Bassett played Linus, a boy who met, and became involved with Betty while they were in rehab together. After overdosing, Linus and Betty are taken to the hospital and, let’s just say… well, this isn’t a Disney movie.

There may not have been an actor with a better resume than Faye Dunaway to have ever stepped foot onto the “Grey’s Anatomy” set. By the time she arrived at Seattle Grace, she had had a four decades long career that had seen her star in some of the most iconic films of a generation. These include “Chinatown,” “Bonnie and Clyde,” and “Network,” the latter for which she took home an Oscar! Dunaway brought all that experience and more to her role as Dr. Margaret Campbell, the hospital’s first female surgeon.

Having someone with supernatural powers could come in very handy at a hospital. But unfortunately Pellegrino was a couple years away from making his first appearance on “Supernatural” when he showed up in the ER. Although, come to think of it, we aren’t sure Lucifer would really fit in in a hospital setting. Pellegrino appeared in the season four premiere of “Grey’s Anatomy,” playing Chris. He was a man who showed up at the ER with a bleeding deer in his truck... and a bloody arm in his hands. For those worried about the deer, Izzie was able to save it - while the arm belonged to a pregnant woman who was in a car crash.

So, you may recognize this guy from the original “It,” “Buffy the Vampire Slayer” or perhaps as Scott Evil from the “Austin Powers” franchise. Seth Green is also the creator of Adult Swim’s “Robot Chicken,” along with being the show’s featured voice. Back in 2007, he appeared on “Grey’s Anatomy” as Nick Hanscom, a patient with a tumor on his carotid artery. Spoiler Alert: it doesn’t go well for Nick. Just ask Lexie Grey, who is at the receiving end of an unfortunate blood burst. After the blown artery and a stroke, Nick Hanscom passes away, marking the end of Seth’s narrative arc.

For her lead role on Nickelodeon’s “True Jackson, VP,” this starlet was one of TV’s most well-paid teenage actresses. Later on, Keke Palmer starred on the FOX series “Scream Queens.” One year before her first episode as Zayday Williams, Keke briefly appeared on “Grey’s Anatomy” as Sheryll Jeffries, a 17-year old patient with hypoplastic left heart syndrome. When surgery doesn’t work, Sheryll takes off and gets pregnant, which gives her a new perspective. She hopes to become a candidate for Cristina’s clinical trial, but unfortunately, she’s past the age cut-off and gets rejected.

Many years before she entered Westworld, Tessa Thompson entered Seattle Grace hospital as Camille Travis - but only in season 2 as the niece of Dr. Richard Webber was played by another actress in season 4. Camille had ovarian cancer when she was 14 and when she passes out while having sex during her prom, doctors make the sad discovery that the cancer is back. And it’s worse than before. Tessa, like Vanessa Marano, also appeared on multiple shows in the “Grey’s” universe as different characters. Three years after her two-episode stint as Camille Travis, Thompson played Zoe Salter in two episodes of the “Grey’s” spinoff, “Private Practice.”

Ricci was in the same episodes of a two-part story that saw Kyle Chandler become a hero and a fan favorite. Remember when we told you that Chandler played a member of the Bomb Squad? Well, he was at the hospital because a patient came in with unexploded bazooka ammunition in their chest. And the person holding the ammunition and stopping the bleeding with her hand was paramedic Hannah Davies, played by Ricci. Christina was a pretty big star at the time and the first of the two episodes, “It’s the End of the World,” was aired following the 2006 Super Bowl. That same episode is still the show’s highest rated and most watched ever.

Some call him Juice, while others know him as Shades. Over the years, Theo Rossi has earned a loyal fanbase for his “Sons of Anarchy” and “Luke Cage” roles. For his two-episode run on “Grey’s Anatomy,” Theo plays a paramedic named Stan Giamatti, the unfortunate victim of an ambulance crash. The character actually gets wedged in a door but survives long enough to reunite with his wife. But just as Seth Green’s character passes away in the episode “Crash Into Me, Part 2,” poor Stan also has the same fate.

Let’s be honest: most people know this actress as Peggy Olson from “Mad Men”. Elisabeth Moss also delivered award-winning performances in “Top of the Lake” and “The Handmaid’s Tale.” During “Grey’s Anatomy” Season 3, she appeared in one episode as Nina Rogerson, the daughter of a 41-year-old patient with a rare bone disease. The episode aired just four months before “Mad Men” premiered, so Moss was still relatively unknown. The character’s mother passes away, and Nina obviously has a rough time. This role essentially marks the rebirth of Elisabeth’s extraordinary television career.

Marcia, Marcia, Marcia! This prolific actress famously starred as Marcia Clark on “The People v. O.J. Simpson,” and she’s also an “American Horror Story” regular. Though Paulson only appeared in one “Grey’s Anatomy” episode, the role is significant. She plays Meredith’s mother, Dr. Ellis Grey, who suffers from Alzheimer’s disease. The character shows up in a flashback sequence, as Richard Webber reflects on his former colleague. The episode examines the rise of AIDS in the early ‘80s, along with the relationship between two doctors who are trying to understand each other, and the nature of a frightening disease originally known as GRID.

Hey, isn’t that Paris Geller from “Gilmore Girls” and Bonnie Winterbottom from “How to Get Away with Murder”? Why, yes, yes it is. In a season 5 episode of “Grey’s Anatomy,” Liza Weil plays Alison Clark, a Stage 4 cancer patient, who forms a bond with Izzie Stevens during chemotherapy treatment. The character ultimately passes away, and Liza Weil’s moving performance opened the door for other roles. By the way, her “Gilmore Girls” co-star Edward Herrmann appeared in three episodes from “Grey’s Anatomy” Season 4, playing what’s seemingly the “World’s Oldest Intern.”

When Eleven, we mean Millie, appeared in an episode of “Grey’s Anatomy” in 2015, most people watching wouldn’t have thought anything of it. She was just an actress, playing the part of a girl who performs an emergency medical procedure on her mother while doctors provide her with instructions over the phone. However, the following year, “Stranger Things” premiered on Netflix and everything changed. At the time her episode aired, Brown wouldn’t have even been considered for this list. And now she finds herself all the way in this spot!

When only five years old, this actress starred in M. Night Shyamalan’s “Signs.” A few years later, Abigail Breslin received an Oscar nomination for “Little Miss Sunshine.” In the mid-2010s, she transitioned to the small screen as Libby on “Scream Queens.” Nearly a decade before, Abigail appeared in one “Grey’s Anatomy” episode as Megan Clover, aka Supergirl, a kid who does not feel pain whatsoever. It’s revealed that Megan suffers from internal injuries and CIPA (congenital insensitivity to pain with anhidrosis), which requires a corrective surgery. Overall, it’s an emotional performance that allows Abigail to be tough and vulnerable, as she learns just how much her foster parents truly care.

Since releasing her breakout single “Candy” in 1999, this versatile performer has established herself in both feature films and television. Back in 2010, Mandy Moore appeared in four “Grey’s Anatomy” episodes as Mary Portman, who initially comes in for a colostomy bag reversal surgery. Unfortunately for the character, a shooter emerges at the hospital; yet Mary survives and is reunited with husband Bill. Despite a successful surgery in season 7, Mandy’s character slips into a coma and never wakes up, leaving her loved one to make a heart-breaking decision.

Before appearing in films like “Prisoners” and “Don’t Breathe,” this actor appeared in some of the most celebrated TV shows of the 2000s. Currently most recognized for his role as Clay Jensen on “13 Reasons Why”, Dylan Minnette once appeared as a guest star on “Grey’s” in its fourth season. He plays Ryan – a character with no official last name. However, the character is probably best known for not having external ears. In this storyline, Ryan bonds with Meredith while trick or treating, ultimately leading to a pro bono ear reconstruction.

They’re a movie star, a pop star and a television star. Believe it or not, it all began with a role on “Barney and Friends.” And just as Demi Lovato’s adult career reached new heights in 2010, they appeared on a Season 6 “Grey’s Anatomy” episode as Hayley May. The character has a rough time at Seattle Grace, and is incorrectly diagnosed with paranoid schizophrenia. This role allows Demi to show off their acting chops; and the character arc has a happy ending, as Hayley is finally correctly diagnosed with Superior Canal Dehiscence Syndrome and undergoes successful surgery.