Pharrell Williams and co. will play at Reading on the Saturday, and Leeds on the Sunday, between Dua Lipa and Panic At The Disco!
Also confirmed today are Twisted Wheel, Big Heath and Russell Kane.
This year's festivals will be headlined by Kendrick Lamar, Fall Out Boy and Kings of Leon. You can view the full lineup below.
Reading and Leeds Festivals will take place from 24-26 August 2018. Find out more on our Reading and Leeds guides. Tickets to Reading Festival 2018 are now sold out, however ticket holders can still purchase accommodation and extras. Tickets to Leeds festival are still on sale.