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

Marguerite Namara as Lady in Waiting

William Arnold as City Editor (uncredited)

William Augustin as Detective #2 (uncredited)

Allan Cavan as Court Officer (uncredited)

Jean Chatburn as Blonde (uncredited)

Oliver Cross as Court Officer (uncredited)

Edgar Dearing as Tim - Policeman at Mrs. Schmidt's (uncredited)

Sayre Dearing as Ceremonial Guest (uncredited)

Adolph Faylauer as Reception Guest (uncredited)

Jean Fowler as Guest (uncredited)

Dick Gordon as Ceremonial Guest (uncredited)

Sam Harris as Court Officer (uncredited)

Carey Harrison as Court Officer (uncredited)

Jack Holmes as Radioman at Boat (uncredited)

Robert Homans as Detective #1 (uncredited)

Thomas Monk as Gresham's Butler (uncredited)

Edmund Mortimer as Court Officer (uncredited)

Dick Rush as Police Sergeant (uncredited)

Loretta Russell as Guest (uncredited)

Scott Seaton as Guest (uncredited)

Phillips Smalley as Reception Guest (uncredited)

Frederick Sullivan as Doctor at Gresham's (uncredited)

Bruce Warren as Spottswood's Friend (uncredited)

Eleanor Wesselhoeft as Mrs. Schmidt (uncredited)