Cory Monteith In Rehab: 'Glee' Star Enters Treatment For Substance Abuse

"Glee" star Cory Monteith has checked into rehab for substance abuse treatment , reports People magazine.

The 30-year-old actor has voluntarily admitted himself to treatment , his rep told the magazine, adding, "He graciously asks for your respect and privacy as he takes the necessary steps towards recovery."

Monteith, who has been dating his "Glee" co-star Lea Michele since February 2012 , has discussed his battles with addiction in the past.

In June 2011, he opened up to Parade, telling the magazine that he acted out as a child, and skipped school to get drunk and smoke pot before dropping out at the age of 16. I burned a lot of bridges. I was out of control," he told Parade, adding that he had a "serious [drug] problem" at the time and was doing "anything and everything, as much as possible."

The actor revealed that it was after his mother and a group of his friends staged an intervention when he was 19 that he finally sought help.

Thats when I first went to rehab. I did the stint but then went back to doing exactly what I left off doing," he explained. Monteith said that he likely would have continued spiraling out of control if not for what he called a "crystallizing event. The Canadian-born actor admitted that he stole a "significant amount" of money from a family member knowing full well that he would get caught, which he called a "cry for help."

After being confronted and admitting to the theft, Monteith said he was given an ultimatum to either get clean and sober or be turned over to the police. The actor told Parade, it was only then that he made the choice to turn his life around.