Caitlyn Jenner is finally living her life free and open and it shows in an all-new trailer for her upcoming E! docu-series, "I Am Cait." The reality star promises "no more secrets" in the promo that also shows her mentoring transgender youth and hanging out with her new girlfriends.

Jenner came out in June as a transgender woman and has quickly taken to the spotlight as an emerging activist for the transgender community. It has taken time for everyone in her life to adjust to her transition including her mother, Esther Jenner.

"My first feeling was, 'I lost my son,'" Esther says. "Then I thought, 'You know what? I'm gaining.'"

Caitlyn embraces Kylie in another scene and later breaks down in tears as she explains that she only wants her kids "to be proud of their daddy."

The 65-year-old former Olympian also speaks with a group of transgender youth. She encourages the teenagers "to hang out with the people that love you and respect you," and leads them in cheer, yelling, "We're all beautiful!"

The trailer closes out with Caitlyn raiding Kim Kardashian's closet but the one dress she loves may not be the best choice. "I love this dress," Caitlyn tells her step-daughter, but Kim quickly informs her that Kris Jenner owns the same dress. Whoops!

Caitlyn also started her new weekly blog on Tuesday called, "The Real Me." In her first post, she speaks about her new friends in the transgender community and her responsibility as a transgender celebrity.

"Up until now, I have isolated myself from the transgender community so I have a lot of catching up to do," she wrote. "I feel such a responsibility to this courageous group to try to get it right and tell all sides of the story. To me, that's always the biggest question: am I doing it right?"

"I Am Cait" will premiere on Sunday, July 26 at 8 p.m. on E!