Arrowsmith

Ronald Colman Dr. Martin Arrowsmith

Helen Hayes Leora Tozer Arrowsmith

Richard Bennett Gustav Sondelius

A.E. Anson Professor Max Gottlieb

Clarence Brooks Dr. Oliver Marchand

Alec B. Francis Twyford

Claude King Dr. Tubbs

Bert Roach Bert Tozer

Myrna Loy Joyce Lanyon

Russell Hopton Terry Wickett

David Landau State Veterinarian

Lumsden Hare Sir Robert Fairland

Erville Alderson Pioneer (uncredited)

Ward Bond Cop (uncredited)

Beulah Bondi Mrs. Tozer (uncredited)

Florence Britton Miss Twyford (uncredited)

Nora Cecil Nurse (uncredited)

Sidney De Gray Dr. Hesselink (uncredited)

Cyril Delevanti Committee Member (uncredited)

Walter Downing City Clerk (uncredited)