Lianne La Havas, Willy Moon and Zulu Winter are also among the new additions to the August event
The event takes place in Victoria Park, east London, on August 31, having moved to a much later date this summer to accommodate the London 2012 Olympics.
The festival’s organisers have added a total of eight news acts, with Lianne La Havas, Zulu Winter, Disclosure, Willy Moon and Mahalia also joining the bill.
They join a bill that already includes Spector, Fixers, Summer Camp, Pulled Apart By Horses, Iceage, Theme Park, Rustie, BIGKids, Maverick Sabre and Dry The River. More acts will be confirmed in the coming weeks.
The festival, which was headlined by Bombay Bicycle Club in 2011, has yet to confirm who will be its headliner.
To attend the festival, ticket-holders must be under the age of 18, but over 13. See Underagefestivals.com for more information.
The Underage Festival line-up so far is as follows:
Dry The River
Lianne La Havas
Pulled Apart By Horses
A host of bands at Underage Festival, including Pulled Apart By Horses, Spector, Maverick Sabre are playing at this year’s T In The Park, which is taking place July 6-8 in Balado Park, Kinross. To check the availability of T In The Park 2012 tickets and get all the latest listings, go to NME.COM/TICKETS now, or call 0871 230 1094.