The Season 18 cast of "Dancing with the Stars" will be revealed live on "Good Morning America," ABC announced. The stars will be introduced on next Tuesday's edition of the morning program. "The competition begins with an all new cast of celebrities who will brave the dance floor for the very first time," the network said in a news release. "Each week these celebrities will leave their comfort zones and endure hours of grueling rehearsals to master technical choreography and entertaining performances. In the end, only one star will rise above the rest to be crowned champion and win the coveted mirror-ball trophy." Erin Andrews will join Tom Bergeron as co-host of the show, which will kick off its 18th season March 17.