They”re the unsung heroes of many a Hollywood blockbuster or music video, putting their bodies on the line while the A-listers take the acting plaudits from critics.
But these pictures reveal the vital role performed by film stunt doubles, as they are pictured on set next to their household name counterparts.
Some stars like Tom Cruise and Matt Damon insist on doing their own physically dangerous stunt scenes, while others are happy to let doubles stand in.
Spot the difference: Jennifer Lopez is spotted with her stunt double while filming a music video in Mexico – who just happens to be a man
These images capture the on-set moments actors would prefer you not to see, however, as they are pictured with their near-identical looking colleagues who often step in for the really tough stuff.
Actors and actresses captured with their stand-ins include Jennifer Lopez, Angelina Jolie and Cameron Diaz.
While Harry Potter star Rupert Grint is happy to pose with his acting stand-in, the A-listers pictured with their doubles are caught in more secretive on-set snaps.
“While my stunt double did a lot of the harder stuff, I’ve always been very sporty and the stunts and action are part of the fun.”
A lot of the time actors do perform their own stunts in action movies, with the stunt doubles bought in for “protection”.
Cameron Diaz”s stunt double in Knight and Day, Kimberley Shannon Murphy, has previously revealed how Cruise and Diaz are often two actors who insist on doing a lot of physical scenes themselves.
Filling in: Natalie Portman had ballet dancer Sarah Lane as her double in Black Swan (Portman pictured right)
Unsung hero: Brad Pitt”s double is pictured on the set of World War Z in Glasgow last year, while, right, the man himself takes time out while filming the same movie
She told website bleedingcool.com in 2010: “There are plenty of actors who don’t want to do their own stunts and then you come across others that really want to do as much as they can do and Tom and Cameron are definitely two of those people.
“It”s part of our job to be behind the scenes. We’re recognised within our own community, as the actors are recognised in their own community.
“I think that for any films that I’ve worked on, everyone appreciates everything that stunt people do and what they bring to the table when it comes to making a film.”
In some cases the respective contributions of the stunt double can lead to conflict.
Natalie Portman”s ballet dancing double in Black Swan, Sarah Lane, 27, said the Hollywood actress only performed five per cent of the full-body shots in the last year”s critically-acclaimed film.
Miss Lane claimed she was the victim of a “cover-up” and movie-goers had been misled as to how much of the dancing Portman actually performed in the film.