A European princess arrives in New York City to secure a much-needed loan for her country. She contracts the mumps, and an actress who looks exactly like her is hired to impersonate her.

Sylvia Sidney
as Nancy Lane / Princess Catterina

Cary Grant
as Porter Madison III

Edward Arnold
as Richard M. Gresham

Henry Stephenson
as King Anatol XII

Vince Barnett
as Count Nicholeus

Edgar Norton
as Baron Passeria

Ray Walker
as Dan Kirk

Lucien Littlefield
as Parker

Robert McWade
as Managing Editor

George Baxter
as Donald Spottswood