Article continues below advertisementDylan Efron is stepping up for Ashley Tisdale as she navigates the chaos of a toxic mom group. The little brother of Zac Efron made an appearance on Watch What Happens Live, where he was put on the spot by a caller regarding the recent controversy, and he made his support for the blonde babe crystal clear.Article continues below advertisementArticle continues below advertisementSource: MEGADylan Efron backs Ashley Tisdale amid the toxic mom group controversy.