 The famous scene in the Trevi Fountain was shot in March, when  nights were still cold. According to Federico Fellini (qv) (in an  interview with Costanzo Costantini), Anita Ekberg (qv) stood in  the cold water in her dress for hours without any trouble.  Marcello Mastroianni (qv), on the other hand, had to wear a  wetsuit beneath his clothes, and even that wasnt enough. Still  freezing, he downed an entire bottle of vodka, so that he was  completely drunk while shooting the scene.