Olly Murs, Ella Eyre, Jamie Lawson and Nathan Sykes join Take That at Barclaycard presents British Summer Time in Hyde Park on July 9.
'X Factor' co-host Olly previously revealed he would be joining the 'Back For Good' hitmakers as their fourth member to perform some songs and now he will hit the Great Oak Stage for his own set.
The 'Troublemaker' singer is thrilled to be playing the London landmark as he's never played there before.
In a statement, he said: "Hyde Park is an amazing place for a gig, and I've actually never played there so this is going to be up there with the biggest shows I've done. I love the Take That guys and it'll be great to see them there. Everyone who comes to my gigs knows I like enjoying myself and having loads of fun with the crowd ... I'm looking forward to a great night!"
And that's not all, Ella, rising talent Jamie and former The Wanted star Nathan will also take the stage on the day.
Ella is busy putting the finishing touches to her second LP and announced she would not be playing live until summer so she's likely to have some new music to share at the festival.
Nathan is enjoying success as a solo artist and recently re-released his single 'Over And Over Again' featuring former beau Ariana Grande, which could potentially see him bring the brunette beauty on stage as a special guest.
Completing the line-up for Saturday is 'Wasn't Expecting That' hitmaker Jamie, who was the first artist to sign to Ed Sheeran's own label Gingerbread Man Records and has already enjoyed global success with his number one self-titled debut LP.
The other headliners already announced for Barclaycard presents British Summer Time Hyde Park 2016 are Florence and the Machine on July 2 and Mumford & Sons and on July 8.
Go to www.bst-hydepark.com for tickets and information.