Heath's Antidepressants and Ambien

The three bottles of prescription pills found in Heath Ledger's apartment contained antidepressants and Ambien, a police source tells us. The actor, who was found dead of an apparent overdose this afternoon, had spoken in the past about having trouble sleeping, but one of his friends tells PageSix.com, that the 28-year-old was also battling depression.

"I was hearing that he was depressed," says actor Jonathan Zarin, who met Heath through mutual friends. "I'm sure he must have been in a really bad place. I'd been hearing that for a while."

When asked about the rumors currently circulating that Heath had a drug problem, Zarin responded, "Everyone in Hollywood experiments with drugs."

Zarin said he'd miss his pal. "He was an inspiration to me as an actor. He gave me really good advice on acting. We'd go drinking together and we'd have a really good time."

Police sources tell PageSix.com that Heath's apartment looked "like a temporary crash pad." They say the bed that he was found dead in was just a mattress on the floor with plain white sheets, and the apartment wasn't decorated.Sources add that Michelle Williams, Heath's ex girlfriend, and the mother of his daughter, Matilda, 2, is headed back to the States from Europe, where she was shooting a film.

While there were rumors earlier this evening that Heath's apartment belonged to Mary-Kate Olsen, a police insider tells PageSix.com that the Mart-Kate connection involved the masseuse who found Heath unconscious in his bed. The masseuse, who also works with Mary-Kate, called the actress and asked her what to do. She was promptly told by Mary-Kate to call the police.