Glee star Cory Monteith was found dead in his Vancouver hotel room on Saturday.
According to police, the 31-year-old was found by staff members at the Fairmont Pacific Rim Hotel after the actor missed his checkout time.
Police say several friends were in his hotel room Friday night, but surveillance video shows the actor returning to the hotel alone early Saturday morning. Police are questioning the people he was with on Friday night.
The cause of death was not immediately apparent, but foul play was ruled out. An autopsy will be conducted on Monday.
Monteith, who was known for his role as Finn Hudson on the hit FOX show, had a history with substance abuse. The actor checked himself into a drug addiction treatment facility back in March.