It's very sad, but very true: Dan Harmon is no longer the Community showrunner.

Following weeks of rumors, the genius behind the NBC sitcom posted a message Friday that said Sony never reached out to him after the show was picked up for a fourth season and never attempted to renew his contract.

While fans remain stunned, the Community cast has taken to Twitter to express their own gratitude and outrage:

Joel McHale: "You are a true genius. You gave me the role of a lifetime & three of the best years of my life. Buying #Prototype2 today."

Gillian Jacobs: "I wholeheartedly agree with @joelmchale. I'm so grateful to @danharmon for my role, the show and everything else. Thank you, Dan. Thank you."

Yvette Nicole Brown: "So many thoughts. So little room. I guess, ‘I heart you' and ‘Thank you to INFINITY' will have to do for now. #Community #Love"

Allison Brie: "heavy sigh…," along with a fan's gif of her and the caption: "Dan Harmon is a genius and I will die protecting his vision."

Jim Rash: "Bless ur dementedly awesome brain, @danharmon. U r #Community."

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.