The pop star wed Sam Cooper on Saturday (11.06.11) and the newlyweds will celebrate their union at the music event - which is the place where they first met in 2009 - later this month in Pilton, Somerset, South West England.
Festival organiser Michael Eavis, a close friend of Lily's, will be personally making sure the happy couple - who are expecting a baby together - are well looked after.
He told The Sun newspaper: "I'll set her up a special tent - she'll have the best treatment."
Another source added: "They'll have easy access to all mod-cons. They can feel like they're camping, but there will be no roughing it."
Lily - who runs vintage clothes store Lucy In Disguise with her half-sister Sarah Owen - married building firm boss Sam in a church ceremony in Cranham, near Stroud, Gloucestershire, on Saturday (11.06.11).
Less than 100 guests attended the wedding, including comedian Harry Enfield - who previously dated Lily's mother, film producer Alison Owen - TV star Angus Deayton, the singer's actor brother Alfie and her half-sister Sarah Owen.