London, UK - Daniel Radcliffe, Emma Watson, JK.. Rowling, and more have remembered their Harry Potter co-star Robbie Coltrane as "one of the funniest people" and an "incredible actor" following his death at age 72.

The Scottish star, whose real name is Anthony Robert McMillan, was best known for playing the beloved Hogwarts gamekeeper Rubeus Hagrid in the Harry Potter film series and starring as criminal psychologist Dr Eddie "Fitz" Fitzgerald in ITV’s crime drama Cracker.

His agent of 40 years, Belinda Wright, said Coltrane died on Friday and thanked the medical staff at Forth Valley Royal Hospital in Larbert, near Falkirk in Scotland for their "care and diplomacy."

Radcliffe, who starred as the titular wizard in the Harry Potter films, shared fond memories from their time on set together as he paid tribute to Coltrane.

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In a statement shared to the PA news agency, he said: "Robbie was one of the funniest people I’ve met and used to keep us laughing constantly as kids on the set.

"I’ve especially fond memories of him keeping our spirits up on Prisoner Of Azkaban, when we were all hiding from the torrential rain for hours in Hagrid’s hut and he was telling stories and cracking jokes to keep morale up.

"I feel incredibly lucky that I got to meet and work with him and very sad that he’s passed. He was an incredible actor and a lovely man."

More Harry Potter stars also shared their condolences on social media.

Emma Watson, who starred as Hermione Granger in the franchise, wrote on her Instagram story: "Robbie was like the most fun uncle I’ve ever had, but most of all, he was deeply caring and compassionate towards me as a child and an adult. His talent was so immense that it made sense he played a giant – he could fill ANY space with his brilliance.”

"I’ll really miss your sweetness, your nicknames, your warmth, your laughs, and your hugs," she added. "You made us a family. Know you were that to us."

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Bonnie Wright, who played Ginny Weasley in the films, wrote, "Heartbroken by the passing of Robbie Coltrane. Hagrid was my favorite character! ... Thank you for the laughter."

Harry Potter author J.K. Rowling also shared a photo on Twitter as she paid tribute to the "incredible" actor.

She wrote: "I’ll never know anyone remotely like Robbie again.

"He was an incredible talent, a complete one off, and I was beyond fortunate to know him, work with him and laugh my head off with him.

"I send my love and deepest condolences to his family, above all his children."

Coltrane’s role in all eight of the Harry Potter film series arguably became his best known.

Coltrane shared the Guinness Book of Records' achievement for winning three consecutive Best Actor Bafta awards. The actor is survived by his sister Annie Rae, his children Spencer and Alice, and their mother Rhona Gemmell.