Thirty Day Princess
One of Cary Grant's earliest romantic comedies and a major step toward becoming Hollywood's definitive leading man.

Editorial ratings
- Cary Grant
- Story
- Direction
- Cinematography
- Entertainment
- Historical importance
Introduction
A sophisticated Paramount comedy released during the closing months of the Pre-Code era.
The Story
Nancy Lane impersonates a princess while reporter Porter Madison III uncovers the truth.
Production & Behind the Scenes
Directed by Marion Gering and George Somnes with elegant Paramount production values.
Cary Grant's Performance
Grant displays effortless charm, comic timing, and romantic confidence.
Direction & Themes
Identity, romance, public image, deception, and self-discovery.
Historical Context
One of Paramount's final major Pre-Code romantic comedies.
Legacy & Influence
A landmark in Grant's evolution into Hollywood's premier romantic leading man.
Gallery
Production & release
Late 1933
Production Begins
Production begins.
Early 1934
Production Completes
George Somnes completes production.
March 23, 1934
Theatrical Release
Release.
Summer 1934
Production Code Enforcement
Production Code enforcement begins.
Cast.

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
Other studies.
Cary Grant delivers one of the most compassionate performances of his career as Dr. Noah Praetorius, an unconventional physician whose humanity is tested by prejudice, rumor, and institutional politics.
Cary Grant and Audrey Hepburn create one of cinema's most elegant romantic mysteries—a thrilling game of deception, danger, and unexpected love.