Finn from Glee admitted to rehab Glee star Cory Monteith has been admitted to rehab for 'substance addiction'. Monteith's representative told People magazine that the actor had "voluntarily admitted himself to a treatment facility or substance addiction." People reported the news on its website. This is not the first time in rehab for the 30-year-old actor, who plays Finn Hudson in the Fox TV series. He had treatment when he was 19 and has spoken about his addiction struggles, saying he had a serious problem and took just "anything and everything." In 2011 he told Parade he was "lucky to be alive." Monteith is dating Glee co-star, Lea Michele, who told People that she loved and supported him and was proud he was going to rehab.