Caitlyn Jenner, formerly known as Bruce Jenner, revealed herself to the world on the cover of the July issue of Vanity Fair on Monday, and has now broken a Twitter record by becoming the fastest person to reach one million followers.

Tweeting her thanks for the outpouring of support, Jenner said: "Another Jenner world record, and at 65? Who'da thought! Humbled and honored to have reached 1M followers in 4 hrs. Thank you for your support."

Jenner's family have taken to social media to voice their support, with stepdaughter Kim Kardashian sharing the magazine cover on Instagram with the caption: "Caitlyn Jenner for Vanity Fair... Annie Leibovitz! How beautiful! Be happy, be proud, live life YOUR way!"

Sister Khloe Kardashian also shared the picture, saying: "We were given this life because you were strong enough to live it! I couldn't be prouder!!! Caitlyn, You are beautiful!!!"

Kourtney Kardashian captioned her post: "Freedom! Stunning. #Caitlyn."

Jenner's model daughter Kendall posted a video of the cover shoot to her Instagram followers, saying simply: "Now that's a cover." She also tweeted: "Be free now pretty bird." 

Jenner's youngest daughter Kylie also shared the magazine cover with the caption: "My angel on earth! #caitlyn."