The Blue Lagoon is a 1949 British coming-of-age romance and adventure film directed and co-produced by Frank Launder (with Sidney Gilliat) and starring Jean Simmons and Donald Houston. The screenplay was adapted by John Baines, Michael Hogan, and Frank Launder from the 1908 novel The Blue Lagoon by Henry De Vere Stacpoole. The original music score was composed by Clifton Parker and the cinematography was by Geoffrey Unsworth.

The film tells the story of two young children shipwrecked on a tropical island paradise in the South Pacific. Emotional feelings and physical changes arise as they grow to maturity and fall in love. The film has major thematic similarities to the Biblical account of Adam and Eve.