'Alan Rickman is undoubtedly one of the greatest actors I will ever work with.'
British actor Alan Rickman succumbed to cancer on January 14, immortalising his character Professor Severus Snape in the celebrated Harry Potter series.
The Harry Potter family took to their social media handles to mourn the acting legend.
Daniel Radcliffe aka Harry Potter himself, wrote an emotional post on his Google Plus page that highlighted how wonderful the British actor was despite what people might have assumed given his character's intimidating persona.
'Alan Rickman is undoubtedly one of the greatest actors I will ever work with. 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,' he wrote.
Radcliffe added: 'I'm pretty sure he came and saw everything I ever did on stage both in London and New York. He didn't have to do that. I know other people who've been friends with him for much much longer than I have and they all say, "If you call Alan, it doesn't matter where in the world he is or how busy he is with what he's doing, he'll get back to you within a day."'
Harry Potter author J K Rowling also paid tribute to the actor by tweeting, 'There are no words to express how shocked and devastated I am to hear of Alan Rickman's death. He was a magnificent actor and 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.'
Emma Watson aka Hermione Granger shared kind words on her Facebook page: "I'm very sad to hear about Alan today. I feel so lucky to have worked and spent time with such a special man and actor,' she wrote. 'I'll really miss our conversations. RIP Alan. We love you.'
Emma Thompson, who played Professor Trelawney, said her tribute was 'so hard' to write because she recently 'kissed him goodbye'.
She also co-starred with him in Love Actually.
'What I remember most in this painful leave-taking is his humour, intelligence, wisdom and kindness,' she wrote. 'His capacity to fell you with a look or lift you with a word. The intransigence made him the great artist he was -- his ineffable and cynical wit, the clarity with which he saw most things, including me, and the fact that he never spared me the view. I learned a lot from him.'