When speaking about Caitlyn Jenner's transition, her son Brody recently explained, "Caitlyn is just a much freer person. It's incredible to see the difference between Caitlyn and Bruce." And this marked difference has never been more obvious than in the latest trailer for I Am Cait.

In the video, Jenner - who was often no more than the resigned punching bag of Keeping Up on the Kardashians - is embracing every aspect of her new life and loving it. She's playing tennis, chatting with her mother, advocating for the trans community and laughing more in this video than she ever did on KUWTK.

New I Am Cait teaser shows her mother's emotional reaction

And of course, she's also having a blast when it comes to glamming herself up. But there is one major thing she's going to have to watch out for in the style department: dressing too similarly to her ex-wife Kris Jenner.

"Mom has that," Kim Kardashian tells Jenner when she pulls of a chic black dress with gold accents.

I Am Cait premieres Sunday at 8/7c on E!