Help!

From Wikipedia:
Help! is a 1965 film starring The Beatles and featuring Leo McKern, Eleanor Bron, Victor Spinetti, John Bluthal, Roy Kinnear and Patrick Cargill. The soundtrack was released as an album, also called Help!.

An eastern cult is about to sacrifice a woman to the goddess Kaili^[1]. Just before she is killed however, they notice that she is not wearing the sacrificial ring. It's revealed that Ringo Starr, drummer of the Beatles, has it, sent to him by the victim and her sister, who is also the high priestess of the cult (both of whom are fans of the Beatles), and it's stuck on his finger. Determined to retrieve the ring and sacrifice the woman, the great Swami Clang (McKern), the high priestess Ahme (Bron) and several cult members including Bhuta (Bluthal) leave for London. After several failed attempts to steal the ring without Ringo noticing, they confront him in an Indian restaurant. Ringo learns that if he doesn't return the ring soon, he will become the next sacrifice. Unfortunately, the ring is stuck and he can't take it off.