Glass Animals, Grandaddy, Mavis Staples, Loyle Carner, Lucy Rose, Goldfrapp, Placebo, John Cale, SOHN, The Divine Comedy, Maggie Rogers, and Jorja Smith are all also set to perform at the English bash.

To mark their leap up to superstardom (somehow they're still getting bigger), The 1975's Matty Healy has penned a surreal letter.

Mumford and Sons' appearance isn't going to be a standard slot - they're lugging along their Gentlemen Of The Road shindig, and handpicking the names for the Saturday lineup.

"This collaboration with Latitude is one of the most exciting things we're doing this year," says the band. "Ever since we started working on Gentlemen Of The Road Stopovers we've really enjoyed curating line ups and sharing not only our own music but also sharing music of artists who we love and are listening to regularly. It's almost like creating a mix tape with a best friend, but instead it's a whole day of music, across multiple stages, with 40,000 people!"

Fleet Foxes' headline spot is a UK Festival Exclusive and they promise a mixture of new music and old faves.

Check the full poster and festival details below. There's lots more to come too.

Latitude 2017 takes place 13-16 July at Henham Park in Suffolk. Tickets are on sale now.