A bulked-up Jake Gyllenhaal can be seen in the first trailer for Southpaw.
The actor, who plays boxer Billy 'The Great' Hope in the drama, gained 15 pounds of muscle to take on the role.
Rachel McAdams co-stars as his wife Maureen, who is tragically killed, leaving Hope to raise his daughter alone and face a return to the boxing ring to provide for her.
Forest Whitaker, 50 Cent, Naomie Harris and Rita Ora also co-star.
Training Day's Antoine Fuqua directs, from a script written by Kurt Sutter. Southpaw is released in the UK and US on July 31.
Eminem had been set to star in the lead role before the rapper dropped out to focus on music.
