Edward F. Cline - So This Is Africa (1933)

Bert Wheeler and Robert Woolsey play a couple of broke, hungry vaudevillians who are holed up in a hotel room with a few (tame) lions. They are hired by a movie producer who wishes to send them and their lions to Africa with a great naturalist, in order to make a jungle picture. An earlier expedition by this same naturalist was a failure, because she is afraid of animals. They all head to Africa