Conversation so far:
Why did Frank Sinatra have a career slump?
Both of Sinatra's films Double Dynamite (1951), an RKO Irving Cummings comedy produced by Howard Hughes, and Joseph Pevney's Meet Danny Wilson (1952) failed to make an impression
What was Frank Sinatra's debut film?
Sinatra made his film debut performing in an uncredited sequence in Las Vegas Nights (1941), singing I'll Never Smile Again with Tommy Dorsey's Pied Pipers

Question: Who was in the film with him?
Self-contained rewrite: Who was in the film Las Vegas Nights with Frank Sinatra?