Tributes are flowing for actor and comedian Bob Saget after he was found dead in his hotel room at the age of 65.
The Full House star was pronounced dead at the scene after authorities responded to the Ritz-Carlton Hotel in Orlando, Florida.
The cause of death is as yet unknown, but the Orange County Sheriff's Office said there were no signs of foul play or drug use.
Saget was touring the United States and had just played a show in Jacksonville the night before his death.
Celebrities like Russell Crowe, Whoopi Goldberg, Billy Crystal, Jason Alexander and Saget's Full House co-star John Stamos have responded to the news with shock and sadness on Twitter.
"I am broken. I am gutted. I am in complete and utter shock," Stamos tweeted. "I will never ever have another friend like him. I love you so much Bobby."
Russell Crowe dubbed Saget "kind, funny and generous", adding that he was a "good hang and a good chat," while actor Josh Gad declared there "wasn't a kinder person in Hollywood".
"I am having trouble wrapping my head around this. I do not want to believe this. It's all too much to handle," Gad added.
Kat Dennings, who starred alongside Saget in the 2001 sitcom Raising Dad, said he was "kind and protective".
"Oh god. Bob Saget! The loveliest man. I was his TV daughter for one season and he was always so kind and protective. So so sorry for his family," she tweeted.
Whoopi Goldberg addressed Saget directly, writing: "Sail on my friend Bob Saget, with your huge heart and abject lunacy, my condolences to his daughters and other family."
Meanwhile, Seinfeld star Jason Alexander said losing Saget "hit deep".
"I know that people lose loved ones, good people, every day. No one gets a pass. But the loss of Bob Saget hits deep," he wrote.
"If you didn't know him, he was kind and dear and cared about people deeply. He was the definition of 'a good egg'. Too soon he leaves."
Star Trek star George Takei said Saget was "beloved by millions as America's Dad".
"He was a regular presence in our living rooms, bringing to us the funniest videos and countless belly laughs. Gone too soon, like so many of the brightest souls," Takei tweeted.
Comedian and actor Gilbert Gottfried said he was "still in shock", having spoken to Saget just a few days earlier.
"We stayed on the phone as usual making each other laugh. RIP to friend, comedian and fellow Aristocrat Bob Saget."
Zelda Williams, daughter of the late comedian Robin Williams, wrote that it was "disheartening to lose entertainers that touched us through their work".
"Often doubly so when they were universally known for being kind, caring and funny. RIP to Bob Saget, and my heart goes out to all who knew and loved him," she wrote.
Zelda also warned fans of Saget to be "mindful of the mourning and privacy of his loved ones", drawing on her experience of losing her famous father.
"Don't bombard them if they have socials. Don't consume clickbait media that may have invaded their privacy or violated their safety. They're human."
Kiwi filmmaker and journalist David Farrier tweeted that Saget "provided a lot of laughs", adding: "Your foul language was an inspiration."
Meanwhile, Billy Crystal mourned the loss of a "great friend".
"I'm shocked and saddened to learn that Bob Saget is gone. A great friend and one of the funniest and sweetest people I have ever known. My love to his beautiful family," he wrote.