Thirty Day Princess

Sylvia Sidney

Nancy Lane / Princess Catterina

Cary Grant

Porter Madison III

Edward Arnold

Richard M. Gresham

Henry Stephenson

King Anatol XII

Vince Barnett

Count Nicholeus

Edgar Norton

Baron Passeria

Ray Walker

Dan Kirk

Lucien Littlefield

Parker

Robert McWade

Managing Editor

George Baxter

Donald Spottswood

Marguerite Namara

Lady in Waiting

William Arnold

City Editor (uncredited)