The movie premiered on Dec. 24, 1986.
Sheen, 51, starred as morally conflicted Private First Class Chris Taylor. Depp, 54, played a translator named Lerner, though most of his footage ended up being cut from the final film, while Dillon, 51, played Bunny.
“Platoon” was Sheen’s star vehicle, winning Best Picture in 1987. It was the first of director and Vietnam vet Oliver Stone’s Vietnam War film trilogy, which also includes “Born on the Fourth of July” and “Heaven & Earth.”