James, who played Fred Weasley in the Harry Potter films, wrote in a tweet: "I will miss the random chats about all subjects under the sun. And I'll never forget in September 2000, Robbie Coltrane came over to a very nervous 14yr old me on my 1st ever day on a movie set and said 'Enjoy it, you'll be great.' Thank you for that x."
James's twin brother, Oliver — who portrayed George Weasley in the Harry Potter franchise — also shared a memory of Coltrane in a tweet. "November 2001 - Leicester Square, London. 'Soak this in lads, its like a Rolls-Royce for your first car!' Robbie Coleraine [sic] when he was next to me on the red carpet of the first HP premiere," he wrote. "Over the years we had some great chats about history and travel. Rest in peace Robbie x."