Glee star, Cory Monteith, was found dead in a hotel room on Saturday. Foul-play has been ruled out, and Monteith's autopsy is scheduled for today. Monteith, who was 31 years old and played the beloved Finn Hudson on Glee, was preparing to enter into the fifth season this fall. Co-stars and fans alike are in shock and mourning, as the future of Glee becomes unclear. 

"He leaves a major hole in the heart of the show that will be challenging for the writers and producers to address. While the 'Glee' staff and especially series creator Ryan Murphy have never shied away from handling controversial, tragic or dark subject matter, translating Monteith's loss into a 'death of Finn' storyline may simply prove to sad and all-consuming for the show, but glossing over his absence seems unrealistic. Whatever they decide, the writers will have to proceed very delicately lest dealing with the outcome overwhelm the show's generally light, fun-loving tone." Pop culture expert Scott Huver said in an interview with FOX411. 

As fans begin to mourn, fellow stars are also showing their support to he Monteith family through twitter. 

"My heart goes out to Cory Monteith's family... I met him on the Glee set years ago & he was so lovely and charming." Katie Couric said via twitter.

Although Monteith confessed a history of drug abuse, no evidence has yet been released that his death was drug related.

"Cory Monteith, may your spirit be at peace, and may you fly with the angels... Heartbreaking, my prayers are with all of his loved ones!" said Rihanna via twitter. 

Selena Gomez posted a photo tribute to Monteith and added, "this hurts".