The sudden news of Alan Rickman's death at 69 from cancer on Thursday not only stunned millions of fans, but also many celebrities who worked alongside the actor.
Many of them shared their heartfelt sorrow, sympathy for his wife, Rima, and memories of the man who played Severus Snape and Hans Gruber, among countless others.
From "Harry Potter" author J.K. Rowling:
"Harry Potter" star Daniel Radcliffe himself wrote a touching tribute on Google Plus.
Alan Rickman is undoubtedly one of the greatest actors I will ever work with," Radcliffe wrote in the post. "He is also, one of the loyalest and most supportive people I've ever met in the film industry. He was so encouraging of me both on set and in the years post-Potter."
MORE: Daniel Radcliffe pens moving post about Alan Rickman
Emma Watson, who also starred in the "Harry Potter" films, shared her reflection on Facebook:
Rickman's "Sense and Sensibility" and "Harry Potter" co-star Emma Thompson issued a comment through her management company that read in part, "Alan was my friend and so this is hard to write because I have just kissed him goodbye... He was the ultimate ally. In life, art and politics. I trusted him absolutely." (Read her entire statement here.)
MORE: Alan Rickman remembered through 7 of his finest roles beyond Snape
James and Oliver Phelps, who played the Weasley twins in the "Harry Potter" films:
Bonnie Wright, who played Ginny Weasley, posted a picture of Rickman as Snape and wrote on Instagram:
"Alan. The energy shifted every time you walked onto set. You were an inspiration to us all. RIP"
Matthew Lewis, who played Neville Longbottom in the films, shared a photo of himself with Rickman on Instagram.
"He inspired my career more than he ever knew and I'll miss him," Lewis wrote in the caption.
Sigourney Weaver, who co-starred with Rickman in "Galaxy Quest" and 2006's "Snow Cake," issued a statement where she "can't believe he's gone."
"Alan’s enormous strength of character infused every character he played," her statement read. "Who else could have brought such pain and wit to Snape. He used his talent always to make a difference, his production of Rachel Corrie being one of the most powerful examples."
"Fifty Shades of Grey" author EL James wrote on Twitter:
Here is a collection of the many tributes from Hollywood:
MORE: Nearly 50 years after they met, Alan Rickman and Rima Horton tie the knot
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