 | Cary Grant als Patrick O'Toole |
 | Ginger Rogers als Katherine Butt-Smith/Katie O'Hara |
 | Walter Slezak als Baron Franz Von Luber |
 | Albert Dekker als Gaston Le Blanc |
 | Albert Bassermann als General Borelski |
 | Ferike Boros als Elsa |
 | Harry Shannon als Ed Cumberland |
 | Natasha Lytess als Anna |
 | John Banner als Von Kleinoch (uncredited) |
 | Hans Joby als Kleinoch's Driver (uncredited) |
 | Hans Conried als Vienna Tailor's Fitter (uncredited) |
 | Fred Niblo als Ship's Captain (uncredited) |
 | Fred Aldrich als German Storm Trooper (uncredited) |
| Frank Alten als Official Saying 'Spontaneity' (uncredited) |
 | Felix Basch als Herr Kelman (uncredited) |
| Brandon Beach als Civilian (uncredited) |
| Walter Bonn als German Officer (uncredited) |
| Ace Bragunier als Pilot (uncredited) |
 | Walter Byron als Guard (uncredited) |
| Gordon B. Clarke als German Officer (uncredited) |
| Alexis Davidoff als Traveler in Warsaw (uncredited) |
| Boyd Davis als Chamberlain (uncredited) |
| Claudine De Luc als Hotel Proprietess (uncredited) |
 | James Dime als German Storm Trooper (uncredited) |
| Joseph Diskay als Warsaw Desk Clerk (uncredited) |
| Carl Ekberg als Adolf Hitler (uncredited) |
 | Bess Flowers als Bridge Player (uncredited) |
| Arno Frey als German Officer (uncredited) |
 | Hans Fuerberg als German Storm Trooper (uncredited) |
| Russell Gaige als Baron's Guest (uncredited) |
 | Steven Geray als Café Waiter (uncredited) |
| Frederick Giermann als German Getting Film from Le Blanc (uncredited) |
| Henry Guttman als German Storm Trooper (uncredited) |
| Sam Harris als Bridge Player (uncredited) |
| Ernst Hauessermann als German Getting Film from Le Blanc (uncredited) |
 | Dell Henderson als American Attaché (uncredited) |
 | Adolf Hitler als Himself (archive footage) (uncredited) |
 | George Irving als American Consul (uncredited) |
| Joseph Kamaryt als Czech Official (uncredited) |
| Manart Kippen als German Officer (uncredited) |
| Nicholai Konovaloff als Traveler in Warsaw (uncredited) |
| Adolf E. Licho als French Waiter (uncredited) |
| Oscar Loraine als Ship Steward (uncredited) |
 | Eric Mayne als Curious Nightclub Patron (uncredited) |
| Alex Melesh als Warsaw Waiter Serving Vodka (uncredited) |
| Rudolf Myzet als Czech Official (uncredited) |
| Leda Nicova als Traveler in Warsaw (uncredited) |
| Bob O'Connor als Polish Operator (uncredited) |
 | Emory Parnell als Quisling (uncredited) |
| John S. Peters als Kleinoch's Driver (uncredited) |
| Albert Petit als French Waiter (uncredited) |
 | Otto Reichow als Guard (uncredited) |
 | Bert Roach als Ship Bartender (uncredited) |
 | Lionel Royce als Marshall Mocha (uncredited) |
| Hans Schumm als Warsaw Gestapo Agent (uncredited) |
| Peter Seal als Polish Orderly (uncredited) |
| Dina Smirnova als Traveler in Warsaw (uncredited) |
| George Sorel als German Officer (uncredited) |
| Walter O. Stahl als Baron's Guest (uncredited) |
| Rudolf Steinboeck als Party Guest (uncredited) |
| Robert R. Stephenson als German Storm Trooper (uncredited) |
 | Sigfrid Tor als German Captain (uncredited) |
| Gohr Van Vleck als Baron's Guest (uncredited) |
| Jacques Vanaire als French Radio Announcer (uncredited) |
 | Dorothy Vaughan als Katie's Mother (uncredited) |
 | Henry Victor als German Storm Trooper (uncredited) |
 | Wilhelm von Brincken als German Colonel with American Consul (uncredited) |
 | Hans Heinrich von Twardowski als German Officer (uncredited) |
| Hans Wollenberger als Paris Cafe Waiter (uncredited) |
| Sheridan Gibney | Story |
| Leo McCarey | Director |
| Albert S. D'Agostino | Art Direction |
| Robert Emmett Dolan | Original Music Composer |
| George Barnes | Director of Photography |
| Alfred Herman | Art Direction |
| Leo McCarey | Producer |
| Mel Berns | Makeup Artist |
| Stephen Dunn | Sound Recordist |
| James H. Anderson | Assistant Director |
| Darrell Silvera | Set Decoration |
| Miss Leslie | Costume Designer |
| Claude E. Carpenter | Set Decoration |
| Sheridan Gibney | Screenplay |
| Vernon L. Walker | Special Effects |
| Harry Scott | Assistant Director |
| Leo McCarey | Story |
| Theron Warth | Editor |
