The Lost Boys stars, both 35, are now housemates with Feldman's wife Susan for a new American cable TV series - after years spent estranged.
And with the premiere of The Two Coreys just over a month away (Jul07), the actors admit the show has brought them closer together.
Feldman admits there was a time he felt sure his hellraising former pal wouldn't make it to 40 - but he's glad he has turned his life around.
He tells America's TV Guide magazine, "It was my belief that he was kind of a young doe lost amongst the wildebeests, and that we might never hear from him again until he ended up on the news.
"So the fact he actually suited up and came to the table and got his act together blew me away."
But Haim admits living with the Feldmans wasn't easy: "He does everything with his wife. It's like, 'Cut the umbilical cord, man...' It's a little overboard for my tastes, but that's just me being the jealous friend.
"I love Susan. It's just that I hate the fact that she's changed him so drastically... for the better."
Source: WENN