Niall Horan, Liam Payne, Louis Tomlinson and Harry Styles will headline at the massive Wembley Stadium on Saturday, 6 June, marking their first performance in London as a four-piece.
Zayn Malik quit the band in March.
The big news was revealed on Capital's Breakfast Show, with Liam saying: "Wembley is obviously one of the best places to play in the world so I'm well excited!"
One Direction are just the first of many acts who will be confirmed for the big event - we can't wait to find out who else will be joining them!
Last year, artists included Miley Cyrus, Pharrell Williams, Calvin Harris, Enrique Iglesias, 5 Seconds of Summer, Cheryl Fernandez-Versini and David Guetta.
Tickets for the Summertime Ball go on sale Friday, 1 May at 8am on www.capitalfm.com. Pre-sale through Capital VIP and to Vodafone customers begins Wednesday, 29 April at 8am.