OneTrick Pony is a 1980 film written by and starring Paul Simon. It costars Blair Brown, Joan Hackett and Rip Torn and is directed by Robert M. Young.
Simon plays Jonah Levin, a oncepopular folk rock star who has not had a hit in ten years, and who now opens for punk rock bands. He is trying to record a new album, but faces a number of obstacles, including a trendy but talentless producer played by Lou Reed, and an indifferent record company executive Rip Torn who is pressuring him for something that will sell. He is also trying to restore his relationship with his estranged wife and his young son.The title derives from a colloquial American expression meaning a person specializing in only one area, having only one talent, or of limited ability. ........
Source: Wikipedia