Double Dynamite is a 1951 American musical comedy film directed by Irving Cummings and starring Jane Russell, Groucho Marx, and Frank Sinatra.

The film was written by Leo Rosten (story), Melville Shavelson (screenplay), Mannie Manheim (based on a character created by), and Harry Crane (additional dialogue).

The film was originally entitled It's Only Money, before RKO owner Howard Hughes changed the title to Double Dynamite as a reference to co-star Jane Russell's famous breasts.

[2] The movie involves a bank teller (Sinatra) suspected of embezzling who turns to a sardonic waiter (Groucho Marx) for advice.

Both Sinatra and Jane Russell play against type as a shy, timid pair, while Marx portrays a sarcastic waiter who breezily mentors the frightened young couple.

Jane Russell and Groucho Marx each sing a duet with Frank Sinatra written by Jule Styne and Sammy Cahn.

Emile J. Keck, a friend and waiter at an Italian restaurant they frequent, also urges Johnny to take a chance, even facetiously suggesting he rob the bank where he works.

She finds $20,000, the remainder of what Harris owes Johnny, and goes to see Bob Pulsifer, Jr., the lazy, lecherous son of the bank's founder.

[8] The casting of the three leads went to Jane Russell, under contract to Howard Hughes, who had just bought the studio; Groucho Marx; and Frank Sinatra, who still owed a film to RKO.