The Scottish rockers and returning rave favourites will top the bill at the Welsh Festival, which takes place this year from September 6-9.
Everything Everything, Jessie Ware, Django Django, Ride and Anna Calvi are also among the newly announced acts for this year’s edition of the Portmeirion festival.
The latest batch of tickets will go on sale from 9AM tomorrow and you can buy them here.
We're delighted to reveal our 2018 line-up of music, arts, culture, comedy, theatre, workshops, one-offs and so much more. Tickets will be on sale tomorrow at 10am. Be seeing you… pic.twitter.com/tfgD5mD9Bt
— Festival No.6 (@festivalnumber6) February 13, 2018
Away from the music, other highlights include Trainspotting author Irvine Welsh in conversation with Edith Bowman and Madness singer Suggs performing his one man show.
All the acts join The The, who will perform a previously announced UK exclusive headline slot.
The festival also marks one of Friendly Fires’ first headline slots since announcing their first live performances since 2012.
“Creativity can be an ephemeral thing. Sometimes ideas flow, as does the confidence to develop them into finished pieces of work. Other times it’s a struggle but you battle through it, and during some even more difficult times it feels like nothing comes at all”, Friendly Fires previously said in a statement to announce their comeback.
They added: “Well, we feel like we’ve reached the end of a long period of the latter scenario and are much closer to the former. We’re making music that is meeting the standards we’ve set in the past; the relationships between us are good, and we want to write a new chapter for the band that has been our lives’ most significant work.”