Celebrity News February 16, 2015 Report Reveals How Old Bruce Jenner Was When He Knew He Was Transgender Reality star Bruce Jenner has reportedly known since he was age 5 that he was transgender. According to TMZ, family sources told the site that the former Olympian recently revealed it to his family, but always kept his “true self” hidden, especially from his children. As for Jenner's new name, the reality TV dad hasn't yet said what it will be. #BruceJenner #KardashianJennerFamily #TrendingStories More Will Bruce Jenner Move Forward with Transgender Series Following Fatal Crash? Bruce Jenner's First Words on Fatal Accident Is Bruce Jenner Putting Transgender Plans on Hold After Fatal Car Crash?