The 'Born This Way' hitmaker and 'Yellow' group will take to the stage for a Children In Need Rocks concert at Manchester's MEN Arena on November 17 along with Elbow, N-Dubz, Snow Patrol, Ed Sheeran and JLS - and Gary is "thrilled" to have attracted such a high profile line-up.
He said: "I'm so thrilled that these incredible artists are giving their time for such a special charity that is close to my heart."
Gary - who stepped in to perform solo at a concert at London's Hyde park on Sunday (11.09.11) after Lionel Richie was taken ill - hinted he may sing at the concert, which will be part of the BBC's annual Children In Need charity fundraising drive in the UK.
He added: "I suppose I might be persuaded to sing a bit on the night - anything to help make this year's total the best yet."
He also promised the concert will feature "a secret roster of special celebrity guests and never-before seen surprise collaborations".
Tickets for the show are set to go on sale on Friday September 16 via the BBC Children In Need website.