The Manchester pop duo have been confirmed as special guests at the opening party, taking place at the Ibiza Rocks Hotel on June 16. Support comes from Frankmusic.
Other new additions throughout the summer are Kissy Sell Out, Burn The Negative and South Central.
The announcements come the day after seminal Ibiza night Manumission announced it would not take place this year.
The confirmed line-up for Ibiza Rocks so far is:
Opening Party, with The Ting Tings, Frankmusik, Zane Lowe (June 16)
Friendly Fires (23)
The Kooks (30)
Groove Armada (July 21)
Pendulum, South Central (28)
The Enemy (August 4)
Dizzee Rascal (11)
Vampire Weekend (18)
Soulwax/2ManyDjs, Burn The Negative (September 1)
Closing Party with Klaxons and special guests (8)
More names and dates will be announced soon.