Rex Harrison

Dr. John Dolittle

Samantha Eggar

Emma Fairfax

Anthony Newley

Matthew Mugg

Richard Attenborough

Albert Blossom

Peter Bull

General Bellowes

Muriel Landers

Mrs. Blossom

William Dix

Tommy Stubbins

Geoffrey Holder

William Shakespeare X

Portia Nelson

Sarah Dolittle

Norma Varden

Lady Fetherington

Frank Baker

Trial Spectator (uncredited)

Edward Cast

Prison Guard (uncredited)