The warring Gallagher brothers called a "truce" to work together on an Oasis exhibition celebrating 20 years since the release of the band's debut single Supersonic. Chasing The Sun: Oasis 1993-1997 launches in London on 11 April (14), exactly two decades since the band's first song hit stores in the U.K., and it features a variety of memorabilia from the rockers' career. Photographer Lawrence Watson, who curated the show, has now revealed brothers Liam and Noel Gallagher, who have been estranged since the band's split in 2009, both contributed to the show and put aside their differences to bring the exhibition together. Watson says, "They got on board pretty quickly and started raiding the attic. Everybody's contributed... You could say they've (Liam and Noel) found a sort of truce for the exhibition. I hope they'll come down at a quiet moment."