Plus all the ticket news for this year's festival
The pair will link up for several tracks at the London Roundhouse show on October 28, NME has discovered.
Both acts are playing the opening show of this year’s festival, and although songs are yet to be confirmed the collaboration has been agreed.
Coverage of the festival will be broadcast on BBC 2 and BBC Radio 2.
Tickets for the shows go on sale tomorrow (September 23) at 9am (BST). For more information and to buy tickets, visit BBC.co.uk/Radio2.