When’s Your Birthday? is a 1937 American romantic comedy film directed by Harry Beaumont and starring Joe E. Brown. While original prints of this film had a cartoon sequence in Technicolor directed by Bob Clampett and Leon Schlesinger, most surviving prints (including the Internet Archive) have the sequence in black-and-white.

Plot
Dustin Willoughby (Joe E. Brown) is a prizefighter and believer in astrology who only wins when the stars are in alignment.

Cast
Joe E. Brown – Dustin Willoughby
Marian Marsh – Jerry Grant
Fred Keating – Larry Burke
Edgar Kennedy – Mr. Henry Basscombe
Maude Eburne – Mrs. Fanny Basscombe
Suzanne Kaaren – Diane Basscombe
Margaret Hamilton – Mossy – the Maid
Minor Watson – James J. Regan
Frank Jenks – Lefty – Regan’s Henchman
Don Rowan – Steve – Regan’s Henchman
Granville Bates – Judge O’Day
Charles Judels – Acropolis, the Headwaiter
Corky – Zodiac, the Dog
Bobby Barber – Waiter Who Drops Flower Pot (uncredited)
Ward Bond – Police Detective (uncredited)
Kit Guard – Ringside Cornerman (uncredited)
Tom Kennedy – Fight Manager (uncredited)
Bull Montana – (The) Salvador Slayer (uncredited)