Conversation so far:
When did Bobby Darin start acting?
In the fall of 1959, Bobby Darin played Honeyboy Jones in an early episode of Jackie Cooper's CBS military sitcom/drama, Hennesey.
was Bobby Darin playing Honeyboy Jones in an early episode of Hennesey successful?
In the same year, 1959, Bobby Darin was the only actor ever to have been signed to five major Hollywood film studios.
what other things did Bobby Darin act in besides Hennesey?
Bobby Darin's first major film was the teenager-oriented romantic comedy Come September.
was the film Come September popular?

Question: who were his co-stars?
Self-contained rewrite: who were Bobby Darin's co-stars in Come September?