"I'm lucky on so many counts -- I'm lucky to be alive," the Victoria, British Columbia native told Parade in June 2011, admitting that he indulged in "anything and everything, as much as possible.
"I had a serious problem."
Monteith, who played the role of Finn Hudson on the Fox hit, even admitted his was a cautionary tale, saying the odds were against him when he dropped out of school at 16.
"I don't want kids to think it's okay to drop out of school and get high, and they'll be famous actors, too," he said. "But for those people who might give up -- get real about what you want and go after it.
"If I can, anyone can."
As we previously reported, Monteith was found dead at 31 Saturday at a Vancouver hotel.
Stay with RadarOnline.com for more details on this tragic tale.