Conversation so far:
what did gleason do before films?
Gleason worked his way up to a job at New York's Club 18.
What got him discovered?
Gleason greeted noted skater Sonja Henie by handing her an ice cube and saying.
who discovered him?
Jack L.
Warner first saw Gleason, signing him to a film contract for $250 a week.
what movie was he in first?
Navy Blues.

Question: who else was in the movie?
Self-contained rewrite: Other than Jackie Gleason, who else was in the movie Navy Blues?