Legendary actor and Harry Potter favourite Alan Rickman, who played Severus Snape in the popular franchise, has died at the age of 69.
Thousands of people immediately flooded online to share touching tributes, including numerous celebrities and friends of the actor.
And in particular, his Harry Potter co-stars have shared their own memories and messages about their loss.
Author J.K. Rowling led the tributes with this devastated tweet.
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.
My thoughts are with Rima and the rest of Alan's family. We have all lost a great talent. They have lost part of their hearts.
Harry Potter himself, Daniel Radcliffe, shared this lovely message on his Google+ page.
And Emma Watson shared this on Facebook.
As well as this perfect feminist quote.
#alanrickman
Rupert Grint released a statement, telling JustJared.com:
I am devastated to hear about the passing of Alan Rickman, I feel so privileged to have had the opportunity to work with him on numerous occasions – Even though he has gone – I will always hear his voice. My thoughts are with his friends and family at this time.
Michael Gambon, who played Albus Dumbledore in the franchise and worked on stage with Rickman, told BBC Radio 4:
Everybody loved Alan. He was always happy and fun and creative and very, very funny. He had a great voice, he spoke wonderfully well.
He was intelligent, he wrote plays, he directed a play. So he was a real man of the theatre and the stage, and that's how I think of Alan.
And Matthew Lewis, who starred as Neville Longbottom, revealed how much Rickman inspired his career.
Lucius Malfoy, aka Jason Isaacs, gave this poignant note.
Heartbreaking news about lovely Alan. Nobody else could be as hilarious, tragic, terrifying & truthful all at the same time #RIPAlanRickman
Both Weasley twins, James and Oliver Phelps, also expressed their sadness and shock.
Shocked & sad to hear Alan Rickman has passed away. One of the nicest actors I've ever met.Thoughts and prayers with his family at this time
Terribly sad news about the passing of Alan Rickman. A funny and engaging person who put a shy young actor at ease when I was on HP.
Evanna Lynch who played Luna Lovegood shared this heartfelt message.
Am not prepared for a world without Alan Rickman. Such a beautiful soul. He was so kind & generous in the moments he wasn't Snaping about.❤️
Jamie Campbell Bower, who played Gellert Grindelwald, shared this.
Devastated to hear about the passing of Alan Rickman. I had the pleasure of working with him on my first movie. A true legend and gentleman.
And Filius Flitwick also mourned his friend.
So terribly sad to hear of the passing of Alan Rickman. Honoured to have shared the screen with him. #Marvin #Snape He'll be sorely missed.