Charlie Sheen was born in 1965. Apocalypse Now was made in 1979. He was an extra in that movie but he would have been 13 or 14 at that time. He was an extra in a different movie when he was 9. Yes, I Googled it.
NO, it's not true, because Charlie Sheen WASN'T IN the move "Apocalypse Now." His father, MARTIN Sheen, was though--He played Captain Benjamin L. Willard..... Where did you hear this?? I'm interested to know!