In July 1938 Universal announced the film would star
Danielle Darrieux who they had under contract and who had made
The Rage of Paris for the studio. In October Universal said James Stewart would appear opposite Darrieux in the movie and
Joel McCrea would play a role intended for Stewart,
Destry Rides Again. In January Hedda Hopper reported that Darrieux did not want to return because she did not like the script for
Rio. In March
Joe Pasternak insisted that no one else would play her role. Darrieux's return from France kept being delayed so in June 1939
Sigrid Gurie was cast. Filming started 21 July 1939. It wound up in September.
Filmink said Cummings played "a less typical role, as a seedy drunk who finds redemption." ==Reception==