|Brandon De Wilde (1942 - 1972)|
|The Member of the Wedding (1952) [John Henry]: Dies (off-screen) of natural causes; I believe we only see Julie Harris being informed of his death afterwards. (It's been a long time since I've seen this movie, so my memory is vague.)
In Harm's Way (1965) [Lieutenant Jere Torrey]: Killed in an explosion (along with the rest of his ship's crew) when Japanese ships fire on his PT boat.
The Deserter (La Spina dorsale del diavolo; The Devil's Backbone) (1971) [Ferguson]: Reportedly stabbed in the back. (I haven't seen this movie myself.) (Thanks to Michael)