From ruthless kingpins to charismatic outlaws, Hollywood has given us unforgettable portrayals of history's most notorious criminals. Join us as we count down the most compelling film depictions of real-life gangsters who ruled the underworld! Which actor truly captured the essence of organized crime's most infamous figures?

Not all snitches get stitches. Welcome to WatchMojo, and today we’re looking at the most famous and important gangsters who ratted on their own organizations to law enforcement.

Is this video funny to you? How? How is it funny?! For this video, we’re pulling back the curtain of Martin Scorsese’s 1990 mob movie.

These criminals were hiding in plain sight. For this list, we’ll be looking at high-profile cases of people who turned on their criminal counterparts in exchange for federal protection.

It's crime flick versus crime flick: The Irishman vs. Goodfellas. Has Martin Scorsese outdone himself? As far back as we can remember, “Goodfellas” has always been Scorsese’s crowning contribution to the crime genre. Almost three decades later, however, the director has quite possibly made his magnum opus with “The Irishman.” Which film is a better representation of Scorsese’s work, which is the more intriguing exploration of the mob world, and which came the closest to hitting its target? The Irishman vs. Goodfellas? Let’s find out!

You think you're a tough guy? We'll see about that. Join http://www.WatchMojo.com as we count down our picks for the top 10 movie portrayals of real-life gangsters.

You can't invent villains like this. Join http://www.WatchMojo.com as we count down our picks for the top 10 movie portrayals of real-life bad guys.