| Gene Kelly | Don Lockwood |
| Donald O'Connor | Cosmo Brown |
| Debbie Reynolds | Kathy Selden (not Seldon) |
| Jean Hagen | Lina Lamont |
| Millard Mitchell | R.F. Simpson |
| Cyd Charisse | Dancer |
| Douglas Fowley | Roscoe Dexter |
| Rita Moreno | Zelda Zanders |
| Fred Datig Jr | .Movie usher |
| Robert Dayo | Quartet |
| John Dodsworth | Baron de la Ma de la Toulon |
| King Donovan | Rod |
| Richard Emory | Phil (cowboy in barroom brawl) |
| Charles Evans | Audience member |
| Ernie Flatt | Quartet member |
| Dan Foster | Assistant director |
| Lance Fuller | Bit part |
| Jack George | Orchestra leader |
| Stuart Holmes | J. Cumberland Spendrill III |
| Don Hulbert | Member of quartet |
| David Kasday | Kid |
| Mike Lally | Man in audience of 'Dancing Cavalier' |
| Diki Lerner | Male tango dancer |
| William Lester | Audience member |
| Bill Lewin | Bert (cowboy knocked out in barroom brawl) |
| Paul Maxey | Dancing fat man at party |
| Carl Milletaire | Villain |
| 'Snub' Pollard | Singin' in the Rain sequence: Man on street Kelly gives umbrella to |
| Dennis Ross | Don as a boy |
| Russell Saunders | Fencer |
| David Sharpe | Fencer |
| Julius Tannen | Man in talking pictures demonstration |
| Harry Tenbrook | Sound technician |
| Jimmy Thompson | Male lead in 'Beautiful Girls' number |
| Bobby Watson | Diction coach |
| Robert Williams | Policeman |
| Wilson Wood | Rudy Vallee impersonator |
| Bill Chatham | Male dancer |
| Harry Cody | Bit part |
| Dawn Addams | Lady in Waiting |
| Judy Landon | Olga Mara |
| Joi Lansing | Beautiful blonde |
| Sylvia Lewis | Female tango dancer |
| Dorothy Patrick | Audience member |
| Shirley Jean Rickert | Dancer |
| Margaret Bert | Wardrobe woman |
| Elaine Stewart | Lady in Waiting |
| Madge Blake | Dora Bailey |
| Mae Clarke | Hairdresser |
| Jeanne Coyne | Female dancer |
| Patricia Denise | Female dancer |
| Kathleen Freeman | Phoebe Dinsmore |
