RONNIE O’SULLIVAN won’t be the only former snooker world champion pulling the sleigh of the Seniors British Open this Christmas.

The event is scheduled to take place at the Vaillant Live in Derby on December 27 and 28.

The eight-player event features a star-studded cast and will be televised on Channel 5.

Joe Perry defeated Jimmy White in last year’s final.

While O’Sullivan might be the headline act, he won’t be the only star attraction to viewers.

And the field has now been completed with the addition of three-time world champion Mark Williams.

Williams is snooker’s oldest ever ranking event winner, and showed his Christmas spirit by pledging any prize money he won would go to the Hospice of the Valleys charity.

Speaking to the WSST, the 51-year-old said: “It’s been over 20 years since I last played a tournament in Derby!

“I’m going to enjoy battling it out with the old boys and anything I win is going straight to the Hospice of the Valleys.”

The Welsh Potting Machine won the 2015 World Seniors Championship and adds his illustrious career to that of his fellow players in the festive tournament.

Williams, O’Sullivan, White, Perry, Ken Doherty, Stephen Maguire, Reanne Evans, and Mark Davis complete the line-up.

World Seniors Snooker Chairman, Jason Francis, said: “I am absolutely delighted to welcome Mark Williams to the British Seniors Open and to hear he is going to donate whatever he wins to the Hospice is a tremendous gesture.

“Mark has the chance to be the first player to win both the professional and seniors British Open, but there are 7 other players who are going to do everything then can to stop that.

“It’s going to be a massive event for both Derby and viewers on Channel 5.”