"I am so moved by all the love and support Caitlyn is receiving," Cox writes. "It feels like a new day, indeed, when a trans person can present her authentic self to the world for the first time and be celebrated for it so universally."
Caitlyn Jenner is introduced to the world
Laverne Cox pens heartfelt message for Caitlyn Jenner: 'It's a new day'
In this June 1, 2015 photo, a journalist looks at Vanity Fair's Twitter site with the Tweet about Caitlyn Jenner, who will be featured on the July cover of the magazine. Caitlyn Jenner, the transgender Olympic champion formerly known as Bruce, on Monday unveiled her new name and look in a sexy Vanity Fair cover shoot -- drawing widespread praise, including from the White House. Lesbian, gay, bisexual and transgender campaigners -- and many well-wishers -- welcomed the high-profile debut, as did the 65-year-old Jenner's family, which includes the media-savvy celebrity Kardashian clan. 'I'm so happy after such a long struggle to be living my true self,' Jenner wrote in her first tweet after the magazine released the July cover photo by renowned photographer Annie Leibovitz. (Photo credit Mladen Antonov, AFP/Getty Images)
Great day yesterday for Father's Day. We had so much fun off-roading. So much love and support! Love my family!
The best thing about being a woman is the prerogative to have a little fun #Caitlyn #ServingCindyMcCainRealness #TransRepubsAreTheBestRepubs (dying for that old school glamour waist to breast ratio)
A photo editor views the July cover of Vanity Fair featuring Caitlyn Jenner on June 1, 2015 in Westwood, California. Formerly known as Bruce Jenner, Caitlyn Jenner is an Olympic atlete who came out publicly as transgender in a televised interview with Diane Sawyer. (Photo by Frazer Harrison/Getty Images)
Caitlyn Jenner poses for Annie Leibovitz on the cover of Vanity Fair #CallMeCaitlyn http://t.co/NRyh6R09RR http://t.co/GO1ZgJJKBR
SO gorgeous!!!! RT #BruceJenner's first photo as a woman revealed! Meet #CaitlynJenner HERE! http://t.co/eXq7FSK4Vl #CallMeCaitlyn
Finally free. This made me stop. The feeling of freedom. You go @Caitlyn_Jenner! https://t.co/P4nDwltjxi
#CallMeCaitlyn: Caitlyn Jenner was photographed by Annie Leibovitz for @VanityFair cover http://t.co/vKHoOCvBzO
CAITLYN!!!!!!!!!! Love this. So happy for her. https://t.co/YOo4kdBOJl
Caitlyn? But why isn't it Kaitlyn with a K? (Bravo, Ms. Jenner!)
❤️RT @VanityFair: I’m not doing this to be interesting. I’m doing this to live #CallMeCaitlyn http://t.co/Fkpu3xYYX5 http://t.co/cFKkBeQN4V
#CaitlynJenner has truly broken the Internet. What a moment.
❤️🔥🔥🔥🔥 YAS 🔥🔥🔥🔥❤️
Caitlyn Jenner for Vanity Fair 📷 Annie Leibovitz! How beautiful! Be happy, be proud, live life YOUR way!
now that's a cover.
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While Cox, 31, agrees that the 65-year-old Olympian looks stunning in her Annie Leibovitz photos, her Tumblr post seeks to remind people that it's ultimately what's on the inside that counts.
"Yes, Caitlyn looks amazing and is beautiful but what I think is most beautiful about her is her heart and soul," Cox says. "The ways she has allowed the world into her vulnerabilities. The love and devotion she has for her family and that they have for her. Her courage to move past denial into her truth so publicly. These things are beyond beautiful to me."
She adds that sadly not everyone's transgender journey has been as smooth as her and Caitlyn's experiences.
"Most trans folks don't have the privileges Caitlyn and I have now have," she explains. "It is those trans folks we must continue to lift up, get them access to healthcare, jobs, housing, safe streets, safe schools and homes for our young people. We must lift up the stories of those most at risk, statistically trans people of color who are poor and working class. I have hoped over the past few years that the incredible love I have received from the public can translate to the lives of all trans folks."
"For me it is necessary everyday to celebrate every aspect of myself especially those things about myself that don't align with other people's ideas about what is beautiful," Cox writes. "#TransIsBeautiful is about, whether you're trans or not, celebrating all those things that make us uniquely ourselves."