Niall Horan, Zayn Malik, Liam Payne, Harry Styles and Louis Tomlinson have long been rumoured to be performing at the music extravaganza on Sunday.
Now The Daily Mirror are claiming that the boyband are hard at work preparing for a five-minute slot.
A source said: ‘It’s all hush-hush and the boys have been sworn to secrecy.
‘But they’ve been at rehearsals and can’t wait to do their bit. It will be an unforgettable occasion and they feel privileged to be a part of it.’
The group will reportedly perform their hit song What Makes You Beautiful on ‘flat-bed truck’ which will drive around the athletics track at the Olympic Stadium in Stratford.

I’d also like to say, Happy 1st Birthday to What Makes You Beautiful, it was first played at 8:40am on Radio 1 in London on the 10th August 2011.