Flowers, notes and a candle were left by mourning fans on the sidewalk outside the Soho apartment building.
"You did great work and I know your fans were looking forward to what more you had to offer," read one note.
Ledger's former girlfriend, actress Michelle Williams, who was shooting a movie in Sweden, was informed of his death late Tuesday night, a movie production company spokesman said.
Williams left early Wednesday morning with 2-year-old daughter Matilda Rose, the spokesman said. Ledger was the child's father.
Ledger, Oscar-nominated for his role in "Brokeback Mountain," was found by a housekeeper trying to wake him for an appointment with a masseuse, said police spokesman Paul Browne.
"Pills were found in the vicinity of the bed," he told CNN.
Browne later told reporters some prescription medications were found in the room, including sleeping pills. He said the pills were not "scattered around," as had been reported.
No note was found and there was no indication of foul play, Browne said.
The apartment did not belong to actress Mary-Kate Olsen, as initially reported by The New York Times' Web site and TMZ.com, citing police. Olsen's publicist told CNN the place is "not her apartment, was never her apartment."Mary-Kate has her own apartment in the same building.
source - CNN