Comedian Garry Shandling has died at an LA hospital at age 66.
Reports indicate the funnyman suffered a massive heart attack, with no prior warning.
Sources say Shandling seemed healthy and talking to people Thursday morning.
TMZ reports there was a 911 call from "The Larry Sanders Show" star's home, and he was taken to hospital and was alive when he arrived.
Just last week the comedian was hanging with friends Kathy Griffin and Bob Odenkirk and retweeted this post of Kathy's: