Article continues below advertisementDylan Efron opened up about his brother Zac Efron's reaction to the viral moment from his Dancing With the Stars performance, revealing that Zac got "defensive" when he learned what people were saying online.Article continues below advertisementSource: MEGADylan Efron was supported by his brother, Zac Efron, when he joined 'DWTS.'Article continues below advertisement"I actually did speak to Zac about this because I was just saying it as I thought it was funny," Dylan, 33, said during a Tuesday, November 9, appearance on "SiriusXM's Smith Sisters Live.