Question: is blue lagoon based on a true story

Answer: No, The Blue Lagoon is a 1980 American romantic survival drama film directed by Randal Kleiser from a screenplay written by Douglas Day Stewart based on the 1908 novel of the same name by Henry De Vere Stacpoole. The film stars Brooke Shields and Christopher Atkins. The music score was composed by Basil Poledouris and the cinematography was by Néstor Almendros.