Passage: With his acting career heading nowhere, Nicholson seemed resigned to a career behind the camera as a writer/director. His first real taste of writing success was the screenplay for the 1967 counterculture film The Trip (directed by Corman), which starred Peter Fonda and Dennis Hopper. After first reading the script, Fonda told Nicholson he was totally impressed by the writing and felt it could become a great film. However, he was disappointed with how the film turned out and blamed the editing which turned it into a "predictable" film and said so publicly. "I was livid", he recalls. Nicholson also co-wrote, with Bob Rafelson, the movie Head, which starred The Monkees. He also arranged the movie's soundtrack.

Question: Who starred in The Trip?
Peter Fonda and Dennis Hopper