Julianne Hough will take part in the seventh season of Dancing With the Stars with dance partner Cody Linley, it was announced Monday (Aug. 25). The first episode will air on Sept. 22 on ABC. The 18-year-old actor played Jake Ryan, the boyfriend (and, later, ex-boyfriend) of Hannah Montana on the popular Disney Channel series. He is the youngest celebrity ever to compete on Dancing With the Stars. Hough won the competition in the season finale in seasons four and five. Other celebrities this year include Lance Bass, chef Rocco DiSpirito, Olympic beach volleyball player Misty May-Treanor, Olympic runner Maurice Greene, Toni Braxton, Kim Kardashian, Cloris Leachman, Ted McGinley, Brooke Burke, comedian Jeffrey Ross, football player Warren Sapp and Susan Lucci.