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 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) Marni Nixon Eliza Doolittle (singing voice) (uncredited) Al Bain Cockney (uncredited) William Beckley Footman (uncredited) Lillian Kemble-Cooper Lady Ambassador (uncredited) Henry Daniell Ambassador (uncredited) Brendan Dillon Leading Man (uncredited) 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 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) Marni Nixon Eliza Doolittle (singing voice) (uncredited) Al Bain Cockney (uncredited) William Beckley Footman (uncredited) Lillian Kemble-Cooper Lady Ambassador (uncredited) Henry Daniell Ambassador (uncredited) Brendan Dillon Leading Man (uncredited)