Thunderhead, Son of Flicka is a 1945 American Western film directed by Louis King and starring Roddy McDowall, Preston Foster, and Rita Johnson.

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).

Ken's mother, Nell, officially names the colt Thunderhead after the billowing white clouds she sees overhead.

Meanwhile, the Albino, a wild mustang stallion that has been raiding local ranchers' herds for years, steals Rob's best mares and kills Banner, putting the family near bankruptcy.

Earlier Technicolor features used black and white negative film photographed behind color filters, or used Monopack only for certain sequences.