Jake Gyllenhaal in SouthpawJake Gyllenhaal has been hitting the gym for his starring role in "Southpaw." Antoine Fuqua ("The Equalizer," "Olympus Has Fallen," "Training Day") directs this gritty flick about a champion boxer named Billy Hope who kicks butt in the ring... and out of the ring too. As you can see in this trailer, Billy's bad temper has dire consequences, and one dumb outburst turns his world upside down.

Forest Whitaker plays the old-school boxing coach that Billy enlists to get his life back together. 50 Cent, Rita Ora, and Rachel McAdams also appear in this intense-looking drama written by Kurt Sutter of "Sons of Anarchy" and "The Shield" fame. Sutter reportedly pitched the movie with Eminem in mind, but the rapper decided to focus on music instead. In fact, he provided a new song for the film, which you can hear a snippet of in the trailer.

Fuqua told the Los Angeles Times, "It's about boxing but it's not about boxing. The heart of the movie is about a man learning to be a father."

"Southpaw" hits theaters July 31.

[Via Time]