Cory Monteith — ‘Glee’ Tried to Save Actor from Heroin Addiction

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The cast of “Glee” — along with several producers — knew Cory Monteith was battling a heroin addiction earlier this year and were the catalyst in his decision to go back to rehab, our sources has learned. 

Sources connected to the production tell us … it was no secret Monteith was off his game back in March — and it became clear he was relapsing, specifically with heroin.

We”re told the cast and the producers became very concerned … and knew they had to address the issue with Cory.

Sources say … the group sat down with Cory and had an “open conversation” with the actor — stressing how much they cared about him and wanted him to get help.

One source tells us Cory was very receptive — “It wasn”t met with resistance … He was always so grateful and aware of how fortunate he was.”

“The decision was to best help our friend. The needs of the show fell second to his well-being.”

Cory voluntarily checked into rehab at the end of March for a 30 day stint … but despite his efforts, he couldn”t defeat his demons, and last week, he died from a lethal mixture of heroin and alcohol.

He was 31.