Crosby, Stills and Nash are to perform at this summer's Glastonbury festival.

The trio, who formed in 1967, confirmed their participation on their website.

The band will perform on June 27th – a day before their occasional fourth band member, Neil Young, is due to headline the event.

As previously reported, Young will headline Glastonbury alongside Bruce Springsteen and Blur.

Other performers this year include Franz Ferdinand, Lily Allen and Fleet Foxes.

The Glastonbury festival in Somerset will take place from June 26th-28th. Tickets have sold out.

(by Jason Gregory)