Troubled “Terminator 2” star Edward Furlong has crash-landed in rehab after a $100,000 drug binge and near-fatal heroin overdose.

It’s the second stint at the Promises clinic in Malibu for the 25-year-old actor — who says he’s spent a staggering $2 million on drugs!

“Eddie has been partying out of control for a long time,” a close pal of the mop-haired star — who’s also been busted for drunk driving — tells The Enquirer.

“When he lost the central role in ‘Terminator 3,’ he spiraled even deeper into drugs.

“Last month he overdosed at a friend’s house in Malibu. Eddie collapsed — and his buddy thought he’d died right there in his living room. His friend had to resuscitate Eddie to bring him back.”

Shockingly, Furlong’s drug habit is so serious that “Eddie says he’s spent probably $2 million on cocaine, heroin and other drugs since he started using as a young teen,” says a TinselTown insider.

“Eddie claims he spent a whopping $100,000 on his last drug binge before deciding that he needed help.”

His pal added: “Eddie knows that either he gets the help he needs now — or he’ll be just another Hollywood casualty.”