The Eggheads programme wrote on social media: "It is with immense sadness that we announce the passing of Eggheads great Chris Hughes.
"Chris joined the show at the very start in 2003 and over the next 20 years gave us not only brilliant answers but very many laughs and happy memories.
Eggheads producer Robert Dean wrote on X: "Very sad to say that our brilliant Egghead Chris has sadly passed away.
Hughes was in the original line-up and joined the show more than 20 years ago after winning Mastermind and International Mastermind in 1983.
Christopher Hughes, who was one of the stars of the hit TV show Eggheads, has died.
