
A European princess visits New York to obtain a crucial loan for her country, but she contracts mumps. To keep the negotiations alive, a look‑alike actress is hired to impersonate her, sparking a tangled double romance as both women navigate love, deception, and high‑stakes diplomacy.
Does Thirty Day Princess have end credit scenes?
No!
Thirty Day Princess does not have end credit scenes. You can leave when the credits roll.
Explore the complete cast of Thirty Day Princess, including both lead and supporting actors. Learn who plays each character, discover their past roles and achievements, and find out what makes this ensemble cast stand out in the world of film and television.

Henry Stephenson
King Anatol XII

Eleanor Wesselhoeft
Mrs. Schmidt (uncredited)

Vince Barnett
Count Nicholeus

Sylvia Sidney
Nancy Lane / Princess Catterina

Cary Grant
Porter Madison III

Robert McWade
Managing Editor

Edward Arnold
Richard M. Gresham

Sam Harris
Court Officer (uncredited)

Jack Holmes
Radioman at Boat (uncredited)

Jean Fowler
Guest (uncredited)

William Arnold
City Editor (uncredited)

Ray Walker
Dan Kirk

Phillips Smalley
Reception Guest (uncredited)

Lucien Littlefield
Parker

Edgar Norton
Baron Passeria

Allan Cavan
Court Officer (uncredited)

Adolph Faylauer
Reception Guest (uncredited)

Dick Gordon
Ceremonial Guest (uncredited)

Loretta Russell
Guest (uncredited)

Scott Seaton
Guest (uncredited)

Dick Rush
Police Sergeant (uncredited)

Sayre Dearing
Ceremonial Guest (uncredited)

Bruce Warren
Spottswood's Friend (uncredited)

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

Oliver Cross
Court Officer (uncredited)

Robert Homans
Detective #1 (uncredited)

Carey Harrison
Court Officer (uncredited)

George Baxter
Donald Spottswood

Frederick Sullivan
Doctor at Gresham's (uncredited)

William Augustin
Detective #2 (uncredited)

Jean Chatburn
Blonde (uncredited)

Marguerite Namara
Lady in Waiting

Thomas Monk
Gresham's Butler (uncredited)
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