Crystal Castles help complete BeatDay bill

Canadian 8-bit duo Crystal Castles have been announced to play BeatDay festival in August.

Ladytron and The Raveonettes will also play the two-day festival as organisers reveal the full line-up.

The latest acts announced join headliners Mew and Arctic Monkeys at the festival.

The full line-up is as follows:

Friday 14 August
Basement Jaxx
Crystal Castles
The Ting Tings
Oh No Ono
Choir Of Young Believers

Saturday 15 August
Arctic Monkeys
Band Of Horses
Jenny Lewis
Lykke Li
The Raveonettes
The Temper Trap

Beatday 2009 will take place in Copenhagen's Valby Park from 14-15 August.