Riley will compete with Derek Hough, who will be participating in his twelfth Dancing with the Stars edition and is the show's only four-time professional champion. He just won the reality dancing competition's sixteenth season with partner Kellie Pickler.
Milian will be paired with Mark Ballas, who is returning for his thirteenth season and has two mirror-ball trophies of his own.
Daugherty will be paired with Peta Murgatroyd, who will be participating in her fifth season. She made her debut as a pro on the show's thirteenth season and was the first pairing voted out, however, she went on to winDancing with the Stars' fourteenth season with celebrity partner Donald Driver.