Margaret O'Brien as Mary Lennox

Dean Stockwell as Colin Craven

Herbert Marshall as Archibald Craven

Gladys Cooper as Mrs. Medlock

Elsa Lanchester as Martha

Brian Roper as Dickon

Reginald Owen as Ben Weatherstaff

George Zucco as Dr. Fortescue

Aubrey Mather as Dr. Griddlestone

Lowell Gilmore as British Officer

Billy Bevan as Barney

Norma Varden as Nurse

Dennis Hoey as Mr. Pitcher

Matthew Boulton as Mr. Bromley

Isobel Elsom as Governess