"I can assure you he's not got an acoustic guitar out trying to write a middle eight for something"
The former One Direction singer will play alongside Tom Grennan, while Robbie Williams will deliver a special half-time performance
They join the likes of Yungblud, Green Day and Russian rapper Oxxxymiron
It comes after huge demand crashed Ticketmaster's website
The tour - which includes a handful of UK and Ireland dates - will see support from Arlo Parks, Mitski, Wolf Alice and Koffee
The pop star is said to be joining Billie Eilish and Kanye West at the top of the festival bill
It comes after the 'Pose' star criticised Vogue magazine's decision to feature Styles on its cover
The singer concluded his ‘Harryween Fancy Dress Party’ gigs in Madison Square Garden on Sunday
He's on tour in the States until the end of November
It's no <em>The Masked Singer</em>