They grew up travelling with their parents as missionaries for the Children of God.
After separating from the religious movement, the family settled in California in the late 1970s, where River started his acting career.
His feature film debut was 1985′s ‘Explorers’, with his break-out role in ‘Stand by Me’ a year later.
The coming-of-age story told of a gang of high school children on the hunt for a corpse, and was adapted from the Stephen King story ‘The Body’.
River was then Oscar-nominated in 1988 for his role in ‘Running on Empty’ and appeared as a young Indiana Jones in 1989′s ‘Indiana Jones and the Last Crusade’.
Rain and Joaquin were present at the scene of River’s death on October 31, 1993, with the actor’s brother calling 911 to the scene and Rain attempting mouth-to-mouth resuscitation.