The Pigeon detectives' Matt Bowman live on stage
Ladyhawke and The Pigeon Detectives are amongst the first acts confirmed for this year's Underage Festival.
They join Metronomy, Esser and Hadouken! in playing the event.
The one-day outdoor party, now in its third year, takes place at London's Victoria Park on 2 August and is exclusively for 14 to 18-year-olds.
Acts already confirmed for the bash include The Whip, Tommy Sparks, Video Nasties and Marina & The Diamonds.
Tickets for the event go on sale later this week.