J.K. Rowling, Emma Watson, Mia Farrow and More Mourn Alan Rickman’s Death on Twitter

Alan Rickman, veteran actor and beloved for his performance in the "Harry Potter" franchise as the chilly villain Severus Snape, died today at 69. His roles, from "Perfume: The Story of a Murderer" to "Love Actually" to "Die Hard," display his vast range; though he excelled at embodying nefarious characters, Rickman was a renaissance actor.

Today, Hollywood mourns the loss of a legend. His "Harry Potter" co-stars and other celebrities took to social media to express their grief. 

"Harry Potter" Family

Celebrities

READ MORE: Remembering Alan Rickman: 9 Essential Performances Now Streaming Online