You're probably incredulous to learn that Mr. Seagal ever had a stunt double to begin with. I mean, the way he annihilates foes while always disguising his face from camera just seemed so natural to us...
Here we see Adam Sandler's stunt double on the set of Jack & Jill. One has to wonder if the movie would have been any better if Mr. Sandler had his double stand in for him for the rest of the movie, as well...and then had a coherent plot stand in for whatever it was they wrote in that thing they called a script.
Todd Senofonte has been standing in for Jean-Claude Van Damme for decades now. They look so much alike, I don't know which one is a successful actor/martial artist, and which one is Jean-Claude Van Damme.
These three guys stood in for Michael J. Fox as his photo double, stand-in and stunt double...though we think that guy on the far right has a great career ahead of him as a Willem Dafoe impersonator. (There's money in that, right?)
Michael Douglas and stuntman Mike Runyard not only look exactly the same, but they're also golfing buddies! We suspect that's so that Mr. Douglas can decide to play whichever ball lands closest to the hole, and nobody will be able to tell who actually hit it.
Puberty is an awkward time for any kid to go through. We have to imagine it's the most awkward, however, for The Walking Dead's Chandler Riggs, who has to be constantly reminded of the fact that he somewhat resembles a 29-year-old woman.