Grease is a 1978 American musical romantic comedy film based on the 1971 musical of the same name by Jim Jacobs and Warren Casey. Written by Bronte Woodard and directed by Randal Kleiser in his theatrical feature film debut, the film depicts the lives of greaser Danny Zuko and Australian transfer student Sandy Olsson, who develop an attraction for each other during a summer romance. The film stars John Travolta and Olivia Newton-John as Danny and Sandy.