After the divorce he saw little of his father due to Joe Monteith's military service, and he had social difficulties at school.
From age 13, he used alcohol and marijuana and started being truant from school.
The cast performed hits from the show and several skits between songs. On July 20, 2013, Ryan Murphy stated in various media outlets that Monteith was set to have a tribute in the third episode of season five, which also dealt with the death of his character, Finn Hudson.
In the second season's eighth episode, "Furt", Tim Stack of Entertainment Weekly noted "It's been a while since we've gotten some Finn focus, and I think I just missed Cory Monteith.
But I also forgot what a good, natural actor he can be".
The coroner wrote that Monteith had experienced intermittent periods of drug abuse and abstinence throughout his life, and that "after a period of cessation from opioid drug use, a previously tolerated drug concentration level may become toxic and fatal." On July 25, Michele and Glee creator Ryan Murphy held a celebration of life for Monteith in Los Angeles, attended by cast, crew, and creators of the show, as well as colleagues from the show's network and studio.
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.
Lea shared a quote that continued her sentiment from this day last year.