Boy! What a Girl!

is a 1947 American race film directed by Arthur H. Leonard and starring Tim Moore, with guest appearances by the Brown Dots, Slam Stewart, Sid Catlett and Gene Krupa.

Would-be theatrical producer Jim Walton (Elwood Smith) is planning a new show that will feature bandleader Slam Stewart and the comic female impersonator Bumpsie (Tim Moore).

The real Madame Deborah identifies herself and agrees to finance Jim’s show, enabling him to achieve his professional goals and to marry Cristola.

Gene Krupa, the only white member of the cast, was not originally signed to appear in the film; director Arthur H. Leonard invited Krupa to be on camera when the famous drummer stopped by to visit cast member Sid Catlett on the set.

[6] A pre-production news item identified Marva Lewis, the ex-wife of boxing champion Joe Louis, as being a part of the cast, but she is not present in the finished film, as she was forced to withdraw due to illness.

The manners, gestures, postures, surprising double takes, swift interplay and communication between the characters is a world unto itself, capturing, despite whatever other distortions or failings, a segment of black American life and culture.