The Mirror reckons that actor Keith told them: "I don't want to duet with Lily on a record. This is her success and I don't want to get in the way. But I think we'll do something at Glastonbury next summer."
Lily Allen is no stranger to getting family members on stage. She brought her younger brother Alfie out onto this weekend's Bestival main stage while singing 'Alfie', a song written about him.
Other acts already being touted around for Glastonbury 2007 include Arctic Monkeys, Bruce Springsteen, The Killers, Kylie, Scissor Sisters and The Who.
The return of the world-famous Worthy Farm fest takes place in Pilton, Somerset, from 22-24 June 2007.