"The actor and director Alan Rickman has died from cancer at the age of 69. He was surrounded by family and friends," a family statement said today.
"Harry Potter" author Rowling led the tributes to the star, who was famous as Professor Severus Snape in the movie adaptation of the best-selling novel.
"There are no words to express how shocked and devastated I am to hear of Alan Rickman's death. He was a magnificent actor & a wonderful man," she wrote.
"What desperately sad news about Alan Rickman. A man of such talent, wicked charm and stunning screen & stage presence. He'll be sorely missed," wrote Fry.
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Popular British actor Izzard tweeted, "I do not want my heroes to die! Alan Rickman is dead and he was another hero. Alan - thank you for being with us. We are sorry you had to go."
"And now we have lost Alan Rickman. A gifted actor and lovely man. What a week. #RIPAlanRickman," Michael Ball posted.
Poulter wrote, "Rest In Peace Alan Rickman. Such sad news. A huge loss."
"Fifty Shades of Grey" author James tweeted, "RIP Alan Rickman. You will be missed. #TrulyMadlyDeeply."
"There are few things I enjoyed more than watching Alan Rickman sigh in a movie. RIP," wrote Seth Mayers.
British singer-actor Tom Fletcher wrote, "So sad to hear that we've lost Alan Rickman. What a brilliantly talented man. Countless amazing performances. What a sad week."
"He did so much brilliant work but Alan Rickman in Galaxy Quest: one of the greatest comedy performances ever. RIP," tweeted British actor David Schneider along with Rickman's video.