William S. Campbell (June 12, 1884 – February 7, 1972) was a film director, scenarist and producer of Hollywood's silent and early talkies era, recognized for his skill in working with children and animals.

[3] His transition to the film business began when opened a movie theater,[4] and then connected with Selig in 1908,[5] for whom he wrote scenarios (today called screenplays).

[6] His animal picture work including "lions for Fox,"[5] and "monkey comedies" for Universal starring Joe Martin the orangutan.

[7] He directed a feature-length comedy for Universal starring Joe Martin and vaudeville performer Harry Burns called Loose Lions and Fast Husbands.

[16] Perhaps most infamously, Campbell directed the 1930 exploitation picture Ingagi about ritual virgin sacrifice to a 600 lb (270 kg) gorilla.