Dylan Efron knows Dancing With the Stars viewers want to see his brother Zac Efron in the crowd. "Hey, he's doing his thing," Dylan, 33, told Extra after the Tuesday, October 21, live show. While he might not be there physically, Dylan did confirm that Zac, 38, is "supporting me every day." Fans were convinced that Zac would join his family in the audience for last week's "Dedication Night" performance, in which Dylan and partner Daniella Karagach performed a contemporary routine to "Rewrite the Stars" from The Greatest Showman.