Demi Lovato reunited with her ex-boyfriend Joe Jonas and the Jonas Brothers to celebrate the upcoming premiere of Disney’s Camp Rock 3. (Lovato starred in the original Camp Rock films as Mitchie Torres while the Jonas Brothers played members of fictional band Connect 3.) The Jonas Brothers produced Camp Rock 3 alongside Lovato, in addition to reprising their onscreen roles alongside Wizards of Waverly Place’s Maria Canals-Barrera as Connie Torres, the director of a summer music camp. Related: Demi Lovato Is in Her 'Producer Era' on Set of Upcoming 'Camp Rock 3' Demi Lovato is putting on her producer hat for Camp Rock 3. Camp Rock 3 premieres on the Disney Channel Thursday, August 13, at 8 p.m.