Splendor in the Grass (1961)
Splendor in the Grass is a 1961 Technicolor romantic drama film that tells a story of sexual repression, love, and heartbreak, from which the character Deanie suffers. Written by William Inge, who appears briefly as a Protestant clergyman and won an Oscar for his screenplay, the film was directed by Elia Kazan.
More at Wikipedia.