New York City Police has confirmed that Academy Award Winning Actor Philip Seymour Hoffman was found dead in his NYC apartment....


According to TMZ:

Hoffman died of an apparent drug overdose ... TMZ has learned authorities found a needle in his arm.

Law enforcement sources tell TMZ ... the actor was found Sunday morning inside of his Greenwich apartment ... and they're still on scene investigating.

Details surrounding his death are unclear ... but the actor had struggled with drug problems ... most recently checking himself into a rehab facility for heroin back in May.

Philip Seymour Hoffman was 46.