| Audrey Hepburn | .... | Eliza Doolittle |
| Rex Harrison | .... | Professor Henry Higgins |
| Stanley Holloway | .... | Alfred P. Doolittle |
| Wilfrid Hyde-White | .... | Colonel Hugh Pickering |
| Gladys Cooper | .... | Mrs. Higgins |
| Jeremy Brett | .... | Freddy Eynsford-Hill |
| Theodore Bikel | .... | Zoltan Karpathy |
| Mona Washbourne | .... | Mrs. Pearce |
| Isobel Elsom | .... | Mrs. Eynsford-Hill |
| John Holland | .... | Butler |
| Elizabeth Aimers | .... | Cockney (uncredited) |
| Helen Albrecht | .... | Ascot Extra (uncredited) |
| John Alderson | .... | Jamie - Doolittle's crony (uncredited) |
| Mary Alexander | .... | Cockney (uncredited) |
| LaWana Backer | .... | Ad Lib at Church (uncredited) |
| Frank Baker | .... | Elegant Bystander (uncredited) |
| Lois Battle | .... | Second Maid (uncredited) |
| Brittania Beatey | .... | Daughter of Elegant Bystander (uncredited) |
| William Beckley | .... | Footman (uncredited) |
| Marjorie Bennett | .... | Cockney with Pipe (uncredited) |
| Oscar Beregi Jr. | .... | Greek Ambassador (uncredited) |
| Betty Blythe | .... | Lady at Ball (uncredited) |
| Diana Bourbon | .... | Ascot Extra (uncredited) |
| Iris Bristol | .... | Flower Girl (uncredited) |
| Tex Brodus | .... | Ascot Extra (uncredited) |
| Sue Bronson | .... | Toff (uncredited) |
| Meg Brown | .... | Ad Lib at Church (uncredited) |
| Buddy Bryant | .... | Prince of Transylvania (uncredited) |
| Walter Burke | .... | Bystander Who Warns Eliza (uncredited) |
| Bea Marie Busch | .... | Cockney (uncredited) |
| Colin Campbell | .... | Ascot Gavotte (uncredited) |
| Jeannie Carson | .... | Ad Lib at Church (uncredited) |
| Paulle Clark | .... | Ad Lib at Ascot (uncredited) |
| Natalie Core | .... | Ascot Extra (uncredited) |
| Tom Cound | .... | Footman (uncredited) |
| Jennifer Crier | .... | Mrs. Higgins' Maid (uncredited) |
| Maurice Dallimore | .... | Selsey Man (uncredited) |
| Allison Daniell | .... | Ad Lib at Ascot (uncredited) |
| Henry Daniell | .... | Ambassador (uncredited) |
| Donna Day | .... | Cockney (uncredited) |
| Roy Dean | .... | Footman (uncredited) |
| Thomas Dick | .... | Cockney (uncredited) |
| Brendan Dillon | .... | Leading Man (uncredited) |
| Anne Dore | .... | Ad Lib at Church (uncredited) |
| Pauline Drake | .... | Ad Lib at Church (uncredited) |
| Harvey B. Dunn | .... | Ascot Extra (uncredited) |
| Sandy Edmundson | .... | Toff (uncredited) |
| Joe Evans | .... | Cockney (uncredited) |
| Kai Farelli | .... | Juggler (uncredited) |
| Ray Foster | .... | Cockney (uncredited) |
| Raymond Foster | .... | Cockney (uncredited) |
| Raymond Foster | .... | Undtermined Role (uncredited) |
| Stanley Fraser | .... | Ad Lib at Church (uncredited) |
| Charles Fredericks | .... | King George V in Fantasy Sequence (uncredited) |
| Lea Genovese | .... | Toff (uncredited) |
| Ayllene Gibbons | .... | Fat Woman at Pub (uncredited) |
| Jack Goldie | .... | Ad Lib at Church (uncredited) |
| Jack Greening | .... | George (uncredited) |
| Beatrice Grenough | .... | Grand Lady (uncredited) |
| Clive Halliday | .... | Costermonger (uncredited) |
| Sam Harris | .... | Guest at Ball (uncredited) |
| Marjory Hawtrey | .... | Ad Lib at Ascot (uncredited) |
| Eric Heath | .... | Costermonger (uncredited) |
| Monika Henreid | .... | Ad Lib at Church (uncredited) |
| William Hoehne Jr. | .... | Blond haired ensemble dancer (uncredited) |
| Eugene Hoffman | .... | Juggler (uncredited) |
| Samuel Holmes | .... | Cockney (uncredited) |
| Jimmie Horan | .... | (uncredited) |
| Clyde Howdy | .... | Ad Lib at Church (uncredited) |
| Kendrick Huxham | .... | Elegant Bystander (uncredited) |
| Lillian Kemble-Cooper | .... | Lady Ambassador (uncredited) |
| Phyllis Kennedy | .... | Cockney (uncredited) |
| Colin Kenny | .... | Ad Lib at Church (uncredited) |
| Goldie Kleban | .... | Cockney (uncredited) |
| Peter Ladefoged | .... | Linguistics Lesson (uncredited, Stimme) |
| Alma Lawton | .... | Flower Girl (uncredited) |
| Queenie Leonard | .... | Cockney Bystander (uncredited) |
| William Linkie | .... | Cockney (uncredited) |
| Moyna MacGill | .... | Lady Boxington (uncredited) |
| Laurie Main | .... | Hoxton Man Not Hoston (uncredited) |
| Sidney Marion | .... | Ad Lib at Church (uncredited) |
| Eric Martin | .... | Ad Lib at Church (uncredited) |
| Owen McGiveney | .... | Man at Coffee Stand (uncredited) |
| John McLiam | .... | Harry (uncredited) |
| Shirley Melline | .... | Ad Lib at Church (uncredited) |
| Carol Merrill | .... | Toff (uncredited) |
| Gigi Michel | .... | Toff (uncredited) |
| Lenore Miller | .... | Cockney (uncredited) |
| John Mitchum | .... | Ad Lib at Church (uncredited) |
| Barbara Morrison | .... | Ascot Extra (uncredited) |
| Marlene Morrow | .... | Toff (uncredited) |
| Alan Napier | .... | Gentleman Escorting Eliza to the Queen (uncredited) |
| Nick Navarro | .... | Dancer (uncredited) |
| James O'Hara | .... | Costermonger (uncredited) |
| Patrick O'Moore | .... | Man (uncredited) |
| Richard Peel | .... | Costermonger (uncredited) |
| George Pelling | .... | Ad Lib at Church (uncredited) |
| Barbara Pepper | .... | Doolittle's Dance Partner (uncredited) |
| Hilda Plowright | .... | Bystander (uncredited) |
| Frank Radcliffe | .... | Cockney (uncredited) |
| Jack Raine | .... | Extra (uncredited) |
| Olive Reeves-Smith | .... | Mrs. Hopkins (uncredited) |
| Christopher Riordan | .... | Suitor at Ball (uncredited) |
| David Robel | .... | Cockney (uncredited) |
| Dinah Anne Rogers | .... | First Maid (uncredited) |
| Victor Rogers | .... | Policeman (uncredited) |
| Corinne Ross | .... | Cockney (uncredited) |
| Baroness Rothschild | .... | Queen of Transylvania (uncredited) |
| Wendy Russell | .... | Ad Lib at Church (uncredited) |
| Kenny Salvatt | .... | Racegoer in 'Ascot Gavotte' Sequence (uncredited) |
| Miriam Schiller | .... | Landlady (uncredited) |
| Buddy Shea | .... | Ad Lib at Church (uncredited) |
| Orville Sherman | .... | Ascot Extra (uncredited) |
| Jacqueline Squire | .... | Parlor Maid (uncredited) |
| Michael St. Clair | .... | Bartender (uncredited) |
| Geoffrey Steele | .... | Taxi Driver (uncredited) |
| Sandy Steffens | .... | Toff (uncredited) |
| Grady Sutton | .... | Ascot Extra (uncredited) |
| Grady Sutton | .... | Guest at Ball (uncredited) |
| Henry Sweetman | .... | Cockney (uncredited) |
| William Taylor | .... | Cockney (uncredited) |
| Joy Tierney | .... | Cockney (uncredited) |
| Arthur Tovey | .... | Singer (uncredited) |
| Gwendolyn Watts | .... | Cook (uncredited) |
| Ron Whelan | .... | Algernon (uncredited) |
| Ron Whelan | .... | Bartender (uncredited) |
| Elzada Wilson | .... | Ad Lib at Church (uncredited) |
| Nick Wolcum | .... | Ad Lib at Church (uncredited) |
| James Wood | .... | Cockney (uncredited) |
| Ben Wright | .... | Footman at Ball (uncredited) |
| Ben Wrigley | .... | Costermonger (uncredited) |