Dwayne “The Rock” Johnson (RAY TANG/REX/SHUTTERSTOCK)

HBO is expanding its relationship with “Ballers” star Dwayne “The Rock” Johnson.  Johnson will produce and appear in a documentary for the network about youth prison boot camps, which is inspired by his young life. The film is set to premiere in May.

Titled “Rock and a Hard Place,” the documentary captures the lives of incarcerated young people who are granted a second chance: the opportunity to trade an extensive prison sentence for a fresh start by completing the famed Miami-Dade County Corrections & Rehabilitation Boot Camp Program. The doc chronicles the harsh six-month program, in which drill sergeants push inmates to their limit, encouraging them to learn from their past mistakes and become constructive members of society so that they’re less likely to return to prison.

Inspired by Johnson’s own experiences with the law as a youth, the wrestler-turned actor will…