The world lost one of its best actors on Thursday when Alan Rickman passed away at the age of 69.

Tributes have been pouring out from those who knew him, worked with him, and loved him. Emma Thompson did all three, and she has penned a touching tribute to the late actor.

In it, she calls him the “ultimate ally” and says she learned a lot from him.

“Alan was my friend and so this is hard to write because I have just kissed him goodbye. What I remember most in this moment of painful leave-taking is his humor, intelligence, wisdom and kindness. His capacity to fell you with a look or lift you with a word. The intransigence which 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,” Thompson said in a statement.

“He was the finest of actors and directors I couldn’t wait to see what he was going to do with his face next. I consider myself hugely privileged to have worked with him so many times and to have been directed by him. He was the ultimate ally. In life, art and politics. I trusted him absolutely. He was, above all things, a rare and unique human being and we shall not see his like again.”

A brief ode to Alan Rickman and Emma Thompson's friendship https://t.co/bUUavZdJsj pic.twitter.com/IcEgMDlDUB

— Huffington Post (@HuffingtonPost) January 15, 2016

Thompson and Rickman appeared in many films together, including Love Actually, Sense and Sensibility, and of course, the Harry Potter films.

The world will truly miss Alan Rickman.