The former Olympic gold medalist made his revelation during a two-hour interview with US journalist Diane Sawyer and while Bruce admitted that Khloe Kardashian was finding the news tough to take in, she was one of the first family members to post a message of support for Jenner.
After retweeting Ellen Degeneres' message of support, Khloe posted:
"She caught me one time [wearing women's clothes], walked in, she said nothing, she jumped in the car and went for a ride. We never talked about it again," Bruce explained. "Then she said another time, 'what's going on?'
"I said okay, I told her all my issues, this and that, after that was over with I felt much better but when I brought it up again, she said she thought it was one of these subject she couldn't talk about."
Open Image Modal
Jenner discussed Kim and Khloe's differing reactions to his revelation
However later, after receiving some wonderful advice from her husband Kanye West, Kim returned to Bruce with some wise words of her own, telling him: "You gotta rock it, girl!"
"There is a thread throughout his life that there was a life he wanted to live," he told Diane Sawyer. "There were clues, I feel like I'm getting an ungraded version of my dad.
“I'm not handling this perfectly. When I see my dad as a woman, it might be a bit shocking at first. We can ask any questions we want.”
After the show, Brandon shared a super-cute throwback snap.
"What I'm doing is going to do some good and we are going to change the world, we are going to make a difference," he said. "If the Kardashian show ['Keeping Up With The Kardashians'] gave me that foot to go and do something then I'm happy with that.”
Bruce Jenner: 9 Facts In 90 Seconds
Bruce Jenner: 9 Facts In 90 Seconds(01 of07)
Open Image Modal
Bruce believes his dyslexia helped him win a gold medal at the 1976 Montreal Olympics, where he also set a new world record in the Decathlon.“If I wasn’t dyslexic, I probably wouldn’t have won the Games,” he said. “And I never would have realised that the way you get ahead in life is hard work.” (credit:ASSOCIATED PRESS)
Bruce Jenner: 9 Facts In 90 Seconds(02 of07)
Open Image Modal
Following his Olympic win, Bruce became an American hero and sporting role model, which saw a whole host of Bruce-related merchandise hitting the shops including dolls, clothing and a board game. But you know you’ve REALLY made it when millions can wake up and have breakfast with you every morning, thanks to your image being used on boxes of American cereal, Wheaties.
Bruce Jenner: 9 Facts In 90 Seconds(03 of07)
Open Image Modal
He has been married - and divorced - three times. He got hitched to actress Chrystie Scott in 1972 before divorcing in 1981. Just days later he walked down the aisle with another actress, Linda Thompson, but it was all over five years later. His longest marriage was to Kris Jenner, who he married in 1991 before divorcing in March 2015. (credit:Wire Image/AP)
Bruce Jenner: 9 Facts In 90 Seconds(04 of07)
Open Image Modal
Bruce was a bit of a sex symbol back in the day, which might explain why he got his hairy rug out for the cover of Playgirl magazine in 1982 (luckily, it was only his shirt he removed for the ladies nudie mag). And no, that isn’t Kris Jenner who’s snuggling up to him, it’s actually his second wife Linda Thompson.
Bruce Jenner: 9 Facts In 90 Seconds(05 of07)
Open Image Modal
Urban legend has it that Bruce was offered the title role in the 1978 ‘Superman’ movie. Not quite. Bruce was never actually offered the role but he DID audition for the part, which was eventually played by Christopher Reeve. (credit:ASSOCIATED PRESS)
Bruce Jenner: 9 Facts In 90 Seconds(06 of07)
Open Image Modal
He might not have got to play Superman but in 1980, Jenner made his big-screen debut in the Village People movie ‘Can't Stop the Music’. Movieline said it was ‘like nothing you’ve seen before’, which was the biggest understatement of 1980. The film was, quite rightly, a huge flop.
Bruce Jenner: 9 Facts In 90 Seconds(07 of07)
Open Image Modal
What connects Bruce with John Travolta and Carol Vorderman? Yep, they love nothing more than sitting in a cockpit for a buzz around the skies, flying their own plane. (credit:Donaldson Collection via Getty Images)