After consultation with Michele, who also plays Monteith's love interest on Glee, showrunners postponed production of Glee's fifth season to August rather than late July.
Consequently, the season premiered a week later than planned.
After an intervention by family and friends he entered drug rehabilitation at age 19.
In a 2011 interview with Parade magazine, he discussed his history of substance abuse as a teen, and in March 2013, he again sought treatment for addiction.
The character must deal with his attraction to both head cheerleader Quinn Fabray (Dianna Agron) and glee club star singer Rachel Berry (Lea Michele), and his storylines increasingly focus on his relationship with them both.
Following his success in that show, Monteith's film work included the movie Monte Carlo, and a starring role in Sisters & Brothers.
Monteith had a troubled adolescence involving substance abuse from age 13; he left school at age 16.
The Vancouver Police Department stated that the cause of death was not immediately apparent, but ruled out foul play.
The final report, released by the British Columbia Coroners Service on October 2, 2013, confirmed these findings.