Few periods were as decadent as 1950s Rome, when Federico Fellini and Luchino Visconti roamed the streets and the famed film studio Cinecittà buzzed with American stars and Italian auteurs. This is the setting for Saverio Costanzo’s new film, starring Lily James as a Liz Taylor-style American movie star, Willem Dafoe as her confidant, and Rachel Sennott as her rival. A romantic melodrama with a touch of surrealism. —Elena Clavarino