The Blue Lagoon is a lost 1923 British-South African silent film adaptation of Henry De Vere Stacpoole's 1908 novel of the same name about children who come of age while stranded on a tropical island. It is the first screen adaptation of the story, and two additional adaptations appeared in 1949 and 1980, with both versions achieving commercial success.

Henry de Vere Stacpoole was an Irish author. His 1908 romance novel The Blue Lagoon has been adapted into multiple films. He published using his own name and sometimes the pseudonym Tyler de Saix.