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

Geoffrey Holder

William Shakespeare X

Norma Varden

Lady Fetherington

Frank Baker

Trial Spectator (uncredited)

Jesslyn Fax

Old Woman (uncredited)

Arthur Gould-Porter

Sir Rupert (uncredited)

Lars Hensen

Minor Role (uncredited)

Queenie Leonard

Courtroom Spectator (uncredited)

Frank Radcliffe

Strong Man (uncredited)

Jack Raine

Vicar (uncredited)

Angelo Rossitto

Dwarf (uncredited)

Rufus

Dog (uncredited)

Ted Stanhope

Assistant Judge (uncredited)

Gilchrist Stuart

The Vicar (uncredited)

Ginny Tyler

Polynesia (voice) (uncredited)