Cory Monteith's final cause of death might not be known for a couple of weeks.

The 'Glee' star was found dead in his hotel room in Vancouver, Canada, on Saturday (13.07.13) aged 31, and while his autopsy got underway earlier today (15.07.13), the British Columbia Coroner's office says they will "definitely" not have the final toxicology results in by today.

The office told Us Weekly: "We might well have an update tomorrow, but final cause of death might be several days or even a couple of weeks after that."

Following the devastating news, the late actor's fans have created a memorial for him outside the Fairmont Pacific Rim Hotel where he was discovered, placing notes and flowers in tribute.

But it's not just in the US and Canada where Cory's death has been mourned as fans of 'Glee' - who are known as Gleeks - paid tribute to the star at a 'Glee' convention at the Thistle Hotel at London's Heathrow over the weekend.

Planned events including autograph sessions with cast members Curt Mega and Telly Leung - who play Nick and Wes in the musical drama series respectively - were ditched after the news of Cory's death broke.

Many of the supporters were chanting his name and singing a rendition of the 'Glee' version of Journey's 'Don't Stop Believin'.

Cory's girlfriend and co-star Lea Michele is said to be "devastated beyond belief" at his passing.