When you watch action movies and see your favorite celebrities doing death-defying stunts, there has to be some part of you that wonders how they can do them. For most actors, their secret lies with their stunt doubles who can do all the flips and tricks while the actor is safely waiting behind the camera. From earning Guinness World Records to being Judo champions, there are so many things people don't know about the stunt artists behind incredible action scenes. These amazing stand-ins will surprise you with their incredible talents and, most of all, the uncanny resemblance to the actors they play. 

Andrew Garfield's Stunt Double Is A Professional Skateboarder

While filming The Amazing Spiderman, Andrew Garfield used a stunt double to perform all of the jumps, kicks, and flips. William Spencer, Garfield's double, is an accomplished stuntman, filmmaker, and skateboarder. Not only was he in Spiderman, but Spencer has also done stunt work for Project X, CSI: NY and The Kids Are Alright. 

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Besides his work as a double, Spencer has also directed and starred in a short film called Block Attack. The film combines stunts and 1980s video game nostalgia. He has traveled all over the world for his skateboarding career as well, and Spencer makes short clips of his incredible board skills.

Jennifer Lopez Uses A Male Stunt Double

If you look at this photo quickly, Jennifer Lopez and her stunt double look identical. However, her double is a male who happens to have a similar bone structure. For J.Lo's music video "Follow the Leader," she had a stand-in to complete some difficult stunts. 

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The music video was shot in Mexico, and J.Lo's double wore a matching black zip-up with the same braided hairstyle. It is actually common for women to have male doubles. In Lara Croft: Tomb Raider, Angelina Jolie had a male double for her stunts as well. 

Brad Pitt's Double Was Forced To Shave His Hands

In Quentin Tarantino's latest film, Once Upon A Time In Hollywood, Brad Pitt plays the stuntman for Leonardo DiCaprio. However, Brad Pitt ended up needing his own stunt double for some of the scenes. Phil Ball was Pitt's double in this film and in World War Z. 

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Ball described the experience as "strange and boring," which is hard to believe for a Tarantino film. During the filming period, Ball tweeted, "Just when I thought my day job couldn't get any more bizarre, I'm made to shave my hands." It's shocking that he wasn't more thrilled to work with some of the biggest names in Hollywood

Megan Fox's Double Once Broke Her Neck And Continued To Work

In the movie Teenage Mutant Ninja Turtles, Megan Fox's character does crazy stunts that definitely require a stuntwoman. Stacy Carino was the stuntwoman for Fox, and she also happens to be a daredevil who makes her scenes look effortless. Carino even broke her neck once without knowing until years later when she had an x-ray

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Carino thought that people who break their necks become paralyzed, so she didn't seek medical attention because she could walk. She is not afraid of anything, and it shows. Carino also said that Fox does some of her own stunts, and can handle some jumps and falls