“Dancing with the Stars” is waltzing its way into its upcoming season, and the new celebrity cast is adding some glitzy bling to their wardrobe, breaking in their dancing shoes and readying themselves for their first dance on the ballroom floor, as the season kicks off MONDAY, SEPT. 24 (8:00-10:00 p.m. EDT), on The ABC Television Network, streaming and on demand. This season’s lineup of celebrity dancers includes an “American Idol” mentor, the first-ever blind contestant to take part in the show, an alumnus from Hogwarts School of Witchcraft and Wizardry, a Duke of Hazzard, an Olympic Gold medal-winning gymnast and a Bachelor Nation favorite, among others.