07/17/2013 13:31 EDT | Updated 09/16/2013 05:12 EDT

Cory Monteith's death 'a terrible waste', Richard Branson says

British billionaire and Virgin Group founder Richard Branson, who worked with Glee’s Cory Monteith on several charity projects, calls the young actor’s recent drug-related death “a terrible waste.”

Monteith, 31, was found dead in his hotel room at the Fairmont Pacific Rim in Vancouver on Saturday. According to the B.C. Coroners Service, the Canadian actor died from a toxic mix of heroin and alcohol.

“It’s just a terrible waste,” Branson told CBC News via Skype from Necker Island, in the British Virgin Islands.

"He was an absolutely delightful young man. He cared enormously about other people. He’d decided to sort of spend his life trying to help the 65,000 homeless youth in Canada to get off the streets and get a decent life. But he had this demon, which was drugs, and sadly it never went away. But in his short life he achieved an enormous amount, and I think has made a big difference in people’s lives.”

Before his death, Monteith had been eager to help young people struggling with homelessness and addiction.

Monteith and Branson worked together on Project Limelight, a free performing arts program for kids living in Vancouver’s troubled Downtown Eastside, and Monteith was an ambassador for Branson’s Virgin Unite charity.

“He was tremendous,” Branson said.

“He obviously related really well to people. He’d had his own problems, which were very similar to the problems of a lot of youth on the streets, and I think a lot of us thought he’d overcome them. But obviously he hadn’t, sadly, and what we’re hoping is that we can continue his good work in the future and hopefully help avoid other kids having the same problems.”

Branson said he and Monteith spoke generally about drug addiction and drug policy, but never about the actor’s personal struggle with addiction.

“The difficulty is if you are in the public eye, admitting that you’ve got a problem — it’s illegal to take substances in Canada and it’s difficult to go to get help. So I think if there’s a change in mindset, people who have problems will be able to confront them publicly and get help and hopefully avoid the absolute disaster that happened to him,” he said.

“Obviously it sends a message: heroin is dangerous, it’s lethally dangerous. And you don’t even know if it’s heroin that you’re taking …. So obviously the message must be to try to avoid it if you can and if you have got a drug problem, forget the fact that it’s illegal — just go and get help and do everything you can to get off it.”

Branson says Monteith will be remembered fondly.

“He had a great sense of humour, he was fun, he threw himself into life,” he said.

“He didn’t just think about himself with his acting career, but he found time for others, and others absolutely loved and adored him. And he’ll be a very sad loss — but we hope to raise lots of money … in his name.”

Monteith’s family and friends have selected three charities — Project Limelight, the Chrysalis Homeless Service and Virgin Unite — to receive donations in his honour.