Canadian actor Cory Monteith, best known for his role as Finn Hudson on Fox's Glee, was found dead this morning in his hotel room in Vancouver of an apparent drug overdose.

The Vancouver Police Department confirmed the sad news in a late night press conference.

According to the report, Monteith, 31, was scheduled to check out of his room at the Fairmont Pacific Rim Hotel today, but failed to do so.

Staff members arrived at his room around noon to find him dead.

He was alone at the time, though police say others were with him earlier that night.

A Forensic Identification Unit dispatched to the scene determined that Monteith had been dead for "several hours."

An autopsy had been scheduled for Monday.

Monteith's recent struggles with substance abuse were revealed back in March, when he checked himself into rehab voluntarily. He had previously entered rehab at the age of 19.

UPDATE: Monteith's Glee cast mates have taken to their Twitter accounts to express their grief for his loss:

[photo via Getty]