Thunderhead, Son of Flicka is a 1945 American Western film directed by Louis King and starring Roddy McDowall, Preston Foster, and Rita Johnson. It is a sequel to the 1943 film My Friend Flicka. The film was adapted to screen by Dwight Cummins and Dorothy Yost from Mary O'Hara's novel, Thunderhead (1943), second in a trilogy with My Friend Flicka (1941) and Green Grass of Wyoming (1946).

Preston Stratton Foster, was an American actor of stage, film, radio, and television, whose career spanned nearly four decades. He also had a career as a vocalist.