Kerry Washington
The Scandal star tweeted, "CAITLYN!!!!!!!!!! Love this. So happy for her."
Gigi Hadid
The supermodel shared on Instagram and Twitter, "'As soon as the Vanity Fair cover comes out, I'm free.' HI CAITLYN, YOU ARE BEAUTIFUL"
Ellen Page
Adding a heart emoji, the actress retweeted Jenner's tweet, "I'm so happy after such a long struggle to be living my true self. Welcome to the world Caitlyn. Can't wait for you to get to know her/me."
Kat Dennings
The 2 Broke Girls star tweeted, "CAITLYN JENNER YOU ARE BEAUTIFUL"
Sophia Bush
The One Tree Hill beauty tweeted, "RT @VanityFair: I'm not doing this to be interesting. I'm doing this to live #CallMeCaitlyn"
Jesse Tyler Ferguson
The Modern Family star tweets, "#CaitlynJenner has truly broken the Internet. What a moment."
Brandi Glanville
The Real Housewives of Beverly Hills star tweets, "@Caitlyn_Jenner I'm so happy for you, and you look AMAZING! #DOYOU"
Maria Shriver
The TV anchor tweeted, "The women's empowerment space got a brave new voice in @Caitlyn_Jenner. Embrace your true self."
Lady Gaga
The "Born this Way" singer tweeted, "Caitlyn, @Caitlyn_Jenner thanku for being a part of all of our lives & using your platform to change people's minds."
John Stamos
Full House's Uncle Jesse tweeted, "Catlyn Jenner I'll go wine tasting with you any time you want! Congrats @Caitlyn_jenner I'm very happy for you!! #Brave"
Lisa Vanderpump
The reality show star tweeted, "Well we should all welcome #CaitlynJenner As the path is paved for the future."
Demi Moore
The 52-year-old beauty tweeted, "Thank you @Caitlyn_Jenner for sharing the gift of your beautiful authentic self inside and out!"
Monica Lewinsky
The motivational speaker tweeted, "insisting on a different ending to her story is EXACTLY what @Caitlyn_Jenner is doing. she is helping so many. BRAVA! @VanityFair"