Just one day after revealing he would be returning to ABC's "Dancing with the Stars" for its 19th season as a pro dancer on "Good Morning America," the network announced that Derek Hough will also be joining the cast of "Nashville" for a multi-episode story arc. Hough will portray Noah West, a beguiling and disarming movie star who crosses paths with the Nashville elite following his being cast as the lead in a biopic of a famous country music star.