VIDEO : Jake Gyllenhall and Eminem Make Surprise Appearance at 'Southpaw' Screening in Detroit

Jake Gyllenhall and Eminem made an impromptu visit to an advance screening of Southpaw in Detroit on Sunday night. The pair reportedly made the quick visit because they wanted to surprise their Detroit fans. Gyllenhall stars in the as Billy "The Great" Hope, a prizefighter whose life unravels after the death of his wife and leads to a custody battle for his daughter. Eminem executive produced the soundtrack and is releasing it on his Shady Records label.