Pain & Gain is a 2013 American action comedy film directed by Michael Bay and written by Christopher Markus and Stephen McFeely, loosely based on a 1999 series of Miami New Times articles by Pete Collins about the activities of the Sun Gym gang, a group of bodybuilding ex-convicts convicted of kidnapping, extortion, torture, and murder in Miami in the mid-1990s. It stars Mark Wahlberg, Dwayne Johnson, and Anthony Mackie. The title is a play on the common fitness adage "no pain, no gain".

The film received mixed reviews; it was praised for its script and performances, but criticized for its directing, historical inaccuracies, and overreliance on violence. It was a commercial success, grossing $86 million worldwide against a $26 million budget. Marc Schiller, the Sun Gym gang's primary victim who was depicted in the film as Victor Kershaw, sued the production company over his portrayal.