See Caitlyn Jenner Pick Out Clothes with Kim Kardashian

Caitlyn Jenner opens up about her family in the newest sneak peek for the upcoming E! docu-series, I Am Cait. "I want them to be proud of their daddy," she confesses, with tears streaming down her face. 

That candid moment is one of many in the preview for the series, which debuts on July 26. Elsewhere in the trailer, her mother, Esther, opens up about watching Caitlyn make the transition. "My first feeling was, 'I lost my son.' Then I thought, 'You know what? I'm gaining,'" Esther reveals. The trailer also shows Caitlyn meeting a transgender youth. "Hang out with the people that love you and respect you," she tells them. "We're all beautiful!"

In addition to the heartwarming moments, there's also some lighthearted ones. While picking out clothes with Kim Kardashian, the reality star tells Caitlyn that the LBD she admires also happens to be one owned by her ex, Kris Jenner.

The trailer premiered the same day Caitlyn launched her new blog series, "The Real Me," in which she opens up about going public with her transition, and how she is "eternally grateful" for all the support she's received. "Up until now, I have totally isolated myself from the transgender community, so I have a lot of catching up to do," she writes. "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?"