Rex Features
The official website for the supergroup made up of former Byrds, Buffalo Springfield and Hollies members David Crosby, Stephen Stills and Graham Nash states that the band will play the festival on June 27.
Occasional fourth member of the group, Neil Young, has already been announced as one of the headliners of the festival.
It is unlikely that Young will join his sometime bandmates on stage, as he has been booked to play Hyde Park Calling in London on the same day.
