Dylan Efron opens up after brother Zac Efron makes long-awaited “DWTS” appearance to cheer him on

"The Iron Claw" star made his first cameo in the live audience, rooting for his younger sibling on Prince Night.

Dancing with the Stars: six couples take on Prince week—live updates

DWTS Semi-Finals go purple with Prince Night as six couples dance two routines to iconic hits. Follow for live updates.