Article continues below advertisementLeonardo DiCaprio's girlfriend, Vittoria Ceretti, supported the actor at the Monday, September 8, premiere of his latest flick, One Battle After Another.However, the model refrained from walking the red carpet with her beau or even solo at the The TCL Chinese Theater in Los Angeles.Article continues below advertisementLeonardo DiCaprio Receives Support at Movie PremiereSource: megaLeonardo DiCaprio's girlfriend, Vittoria Ceretti, quietly attended the premiere of his movie 'One Battle After Another.