McFly have been added to the bill of the free Olympics gig in London's Hyde Park.
The quartet - Tom Fletcher, Danny Jones, Harry Judd and Dougie Poynter - will play the BT London Live show on August 4.
They join a list of acts which include Sir Tom Jones, the cast of We Will Rock You and Feeder.
The event will also feature giant screens carrying footage of many of the sporting events that day, with 25 medals to be awarded.
Finals of the women's 100m and women's triathlon are among the highlights along with a number of swimming and rowing finals too.
The event is in addition to the BT London Live shows which coincide with the opening and closing ceremonies, featuring Duran Duran and Blur.
Photo: © Rex