Cory Monteith's loved ones are in mourning. Credit: Mavrix Online

As the news hit early Sunday, July 14, morning that Cory Monteith had tragically died in his Vancouver hotel room on Saturday, July 13, his friends and family are struggling to deal with their huge loss.

"Everyone is in shock," a source in Vancouver tells Us Weekly. "Everyone is completely crushed." The insider added that they had just spoken to the 31-year-old Glee star two weeks prior. "He sounded good … Never saw this coming."

Another source close to the FOX TV series expressed concern for Monteith's girlfriend, Lea Michele, who declined to comment on the tragic death. (In a statement from the 26-year-old's rep to Us Weekly, the actress asked for privacy during this "devastating time.")

 "I can't even imagine how she is holding up," the source tells Us.

Of the couple's one-year relationship, the source said that the Canadian-born actor adored his Glee costar. "They were really a great couple together and Cory knew how lucky he was to be with Lea." The insider added, "He didn't take her for granted."

The couple remained strong during his month-long rehab stay for substance addiction in April and had recently celebrated his 31st birthday on May 11. "A very happy birthday to the best guy I know Mr. Cory Monteith," Michele tweeted to him on his special day. "Thanks for making me feel like the luckiest girl in the world every day." Indeed, a source at the time told Us that "everything was good" between the pair post-rehab stay.

As Us Weekly reported on Sunday, July 14, Monteith was found dead in a hotel room at the Fairmont Pacific Rim Hotel in Vancouver, Canada. According to Vancouver PD, emergency personnel arrived at the hotel shortly after noon on July 13, at which point Monteith was pronounced dead on the scene by paramedics. Foul play is not suspected. An autopsy will be done on Monday, July 15.