Thirty Day Princess ()

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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.


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Cast verified as complete

Nancy Lane / Princess Catterina
Porter Madison III
Richard M. Gresham
King Anatol XII
Count Nicholaus
Baron Passeria
Dan Kirk
Managing Editor
Donald Spottswood
Marguerite Namara ...
Lady in Waiting
Rest of cast listed alphabetically:
William Arnold ...
City Editor (uncredited)
William Augustin ...
Detective #2 (uncredited)
Allan Cavan ...
Court Officer (uncredited)
Blonde (uncredited)
Tim - Policeman at Mrs. Schmidt's (uncredited)
Guest (uncredited)
Sam Harris ...
Court Officer (uncredited)
Jack Holmes ...
Radioman at Boat (uncredited)
Detective #1 (uncredited)
Thomas Monk ...
Gresham's Butler (uncredited)
Edmund Mortimer ...
Court Officer (uncredited)
Dick Rush ...
Police Sergeant (uncredited)
Guest (uncredited)
Doctor at Gresham's (uncredited)
Bruce Warren ...
Spottswood's Friend (uncredited)
Eleanor Wesselhoeft ...
Mrs. Schmidt (uncredited)

Directed by

Marion Gering

Written by

Preston Sturges ... (screenplay) and
Frank Partos ... (screenplay)
Sam Hellman ... (adaptation) and
Edwin Justus Mayer ... (adaptation)
Clarence Budington Kelland ... (story)

Produced by

B.P. Schulberg ... producer
Emanuel Cohen ... executive producer (uncredited)

Music by

Howard Jackson ... (uncredited)
John Leipold ... (uncredited)

Cinematography by

Leon Shamroy ... (photographed by)

Film Editing by

Jane Loring ... (uncredited)

Art Direction by

Hans Dreier ... (uncredited)
Wiard Ihnen ... (uncredited)

Costume Design by

Howard Greer ... (uncredited)

Second Unit Director or Assistant Director

Arthur Jacobson ... assistant director (uncredited)

Sound Department

Jack A. Goodrich ... sound (uncredited)

Camera and Electrical Department

Elwood Bredell ... still photographer (uncredited)
Milton Bridenbecker ... assistant camera (uncredited)
Daniel L. Fapp ... camera operator (uncredited)

Music Department

Karl Hajos ... composer: stock music (uncredited)
Rudolph G. Kopp ... composer: stock music (uncredited)
Harry Ruby ... composer: stock music (uncredited)

Other crew

Bill Inhen ... associate (uncredited)
Crew believed to be complete

Production Companies




Special Effects


Other Companies



Plot Summary

On a visit to a spa in the Ruritanian Kingdom of Tyronia, American financier Richard Gresham meets the country's ruler, King Anatol XII, and convinces him that he could arrange for $50 million dollars in loans to benefit his impoverished nation if the king's charming daughter could do reciprocal public relations in the States. Unfortunately Princess Catterina falls ill with the mumps and is quarantined for a month aboard ship. Rather than risk having his very lucrative endorsement deal fall through, Gresham hires out-of-work lookalike actress Nancy Lane to impersonate Catterina. Complications arise when she falls in love with investigative reporter Porter Madison, who is looking into Nancy Lane's disappearance. She tries to maintain the precariously delicate balance of playing the two parts convincingly with both the loan and her heart at stake. Written by

Plot Keywords
Taglines HER REIGN WAS SENSATIONALLY SHORT BUT SHE GOT A LOT DONE! (Print ad- Endicott Bulletin, ((Endicott, NY)) 27 July 1934) See more »
Parents Guide Add content advisory for parents »

Additional Details

Also Known As
  • Princesse par intérim (France)
  • Princesa por un mes (Spain)
  • Princesa por um Mês (Brazil)
  • Ksiezniczka przez trzydziesci dni (Poland)
  • Prinzessin für dreissig Tage (Austria)
  • See more »
  • 74 min
Aspect Ratio
Sound Mix
Filming Locations

Did You Know?

Trivia One of over 700 Paramount Productions, filmed between 1929 and 1949, which were sold to MCA/Universal in 1958 for television distribution, and have been owned and controlled by Universal ever since. Its earliest documented telecast took place in Ashville, North Carolina Monday 17 August 1959 on WLOS (Channel 13); its following airings were infrequent but interest in seeing Cary Grant in one of his earlier roles in an otherwise obscure film, eventually brought it out of the vaults in Omaha 2 November 1959 on KETV (Channel 7), in Des Moines 8 March 1960 on WHO (Channel 13), in Johnstown 16 June 1960 on WJAC (Channel 6), and in Detroit 2 December 1960 on WJBK (Channel 2). It was released on DVD 19 April 2016 as one of 18 [Paramount] films in Universal's Cary Grant - The Vault Collection. See more »
Quotes King Anatol: It's extraordinary how much you look like Zizi! Tell me, have you any royal blood in your veins?
Princess Catterina: I don't think so, Your Majesty.
King Anatol: Well, my dear, one can never tell.
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