Dancing With The Stars Season 21 Pros Revealed <br />DWTS Pros revealed on Good Morning America August 19, 2015 <br />Witney Carson, Peta Murgatroyd, Artem Chigvintsev, Valentin Chmerkovskiy, Allison Holker, Sharna Burgess, Mark Ballas, Karina Smirnoff, Derek Hough
