In Mr. Nice Guy, Jackie Chan plays a martial artist named Jackie, because at this point in his career, he figures you're not paying attention to the parts between the fights and the stunts.
"The character I play is called Uncle Deadly, which is also my name. It's like it was written for me!"
—Uncle Deadly, The Muppets
"We see our main character, Bill Paxton, who's playing a character named Bill. Yeah, that's quite a stretch."
...and [starring] 50 Cent, as Air Marshal 50 Cent!