Witney Capri Carson McAllister (born October 17, 1993) is an American professional Latin and ballroom dancer, choreographer, and actress. She first gained attention in 2012, when the 18-year-old finished ladies' second runner-up on So You Think You Can Dance: season 9. Carson continued her professional dancing career in early 2013 as a troupe dancer on Dancing with the Stars: seasons 16 and 17. Carson was promoted to being a "professional partner" in season 18. She returned as a professional for season 19. She and her partner Alfonso Ribeiro were announced the winners of season 19 on November 25, 2014, making her one of five professional dancers to win the mirror ball trophy within their first two seasons. For that season, Carson received a nomination for the Primetime Emmy Award for Outstanding Choreography. Wikipedia