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
Marni Nixon
Eliza Doolittle (singing voice) (uncredited)
Colin Kenny
Ad Lib at Church (uncredited)
Bert Stevens
Gentleman (uncredited)
Frank Baker
Gentleman (uncredited)
Marjorie Bennett
Cockney with Pipe (uncredited)
Betty Blythe
Lady at Ball (uncredited)
Arthur Tovey
Singer (uncredited)
Al Bain
Cockney (uncredited)
William Beckley
Footman (uncredited)
Lillian Kemble-Cooper
Lady Ambassador (uncredited)
Henry Daniell
Ambassador (uncredited)
Brendan Dillon
Leading Man (uncredited)
Iris Bristol
Flower Girl (uncredited)
Geoffrey Steele
Taxi Driver (uncredited)
Charles Fredericks
King George V (uncredited)
Maurice Dallimore
Selsey Man (uncredited)
John Alderson
Jamie - Doolittle's crony (uncredited)
John McLiam
Harry (uncredited)
John Mitchum
Ad Lib at Church (uncredited)
Alan Napier
Gentleman Escorting Eliza to the Queen (uncredited)
Christopher Riordan
Suitor at Ball (uncredited)
Michael St. Clair
Bartender (uncredited)
Grady Sutton
Ascot Extra / Guest at Ball (uncredited)
Stuart Hall
Gentleman (uncredited)
Sam Harris
Guest at Ball (uncredited)
Leoda Richards
Lady Exiting Ascot
Buddy Bryan
Prince of Transylvania (uncredited)