Kanye West has announced that Coldplay’s Chris Martin will be appearing on the Chicago MC’s third solo LP, Graduation, which is due out on Def Jam Records later this year. The Chicago MC recently told billboard.com that Martin is slated to appear on the song “Homecoming,” which will likely be the album’s first single. In 2005, Martin contributed to the song “Beach Chair” on Jay-Z’s comeback LP Kingdom Come. The Coldplay front man and his girlfriend, actress Gwyneth Paltrow, also joined Jay onstage for a historic performance at London’s Royal Albert Hall. It was also revealed that musician Jon Brion, who contributed his talents to West’s Late Registration album, will be returning on Graduation.