His death was announced in a statement from The Tolkien Society, which sent condolences to his family members, including wife Baillie and children Simon, Adam, and Rachel.
Christopher was born in Leeds, United Kingdom on November 21, 1924.
Before he became the literary executor of the Tolkien Estate, he was a lecturer in Old and Middle English as well as Old Icelandic at the University of Oxford.
Upon receiving The Bodley Medal in 2016 for all his work editing his father's posthumous writings, Christopher said: "Although I have never looked for anything remotely of such a kind, I find it especially welcome to receive the Bodley Medal in that it affirms the unique significance of my father's creation and accords a worthy place in the Republic of Letters to Tolkien scholarship". He served as editor and published his father's unpublished material starting with "The Silmarillion" in 1977 and ending with "The Fall of Gondolin" in 2018. Thank you for bringing to life your father's works in the Silmarillion so that we could all share in its brilliance. The Guardian reports that Christopher was even responsible for drawing numerous original maps for his father's Lord of the Rings novels.
"I've just recently heard that Christopher Tolkien has died".
Charlie Redmayne, chief executive of HarperCollins UK which publishes much of JRR Tolkien's work, said he was "the most charming of men, and a true gentleman". The prequel to The Hobbit and The Lord of the Rings books and movies, The Silmarillion - which was picked up to be made into a TV show for Amazon Prime in 2019 - explores the origins of Middle-earth while setting the stage for The Hobbit series.
Scholars of Tolkien's works also noted Christopher's passing, including John Garth, author of 'Tolkien and the Great War, ' as well as Corey Olsen, an academic and podcaster who goes by the moniker The Tolkien Professor.
Christopher Tolkien received widespread attention back in the year 2001 when he expressed his doubts about the viability of the film adaptation of The Lord of the Rings which was directed by well - known filmmaker Peter Jackson. They had two children together Adam Reuel Tolkien and Rachel Clare Reuel Tolkien.