Article continues below advertisementLeonardo DiCaprio has left his girlfriend Vittoria Ceretti "rattled to the core" after a marathon night of partying in London that ended with a $33,000 bar bill - and insiders tell OK! the model now fears he is preparing to move on.DiCaprio, 51, had been in the capital to appear at the BFI Southbank for a discussion about his new action comedy One Battle After Another, released in September.Article continues below advertisementSource: MEGAThe actor was seen partying in London.