AceShowbiz -

A new promo for "I Am Cait", a docu-series about Caitlyn Jenner's transformation, has arrived ahead of the July 26 premiere on E!. The former Olympic athlete, 65, explains why she decided to share her journey on television.

"Why did I decide to do a series? I am telling my story. People don't understand looking into the mirror and nothing seems right. Putting on clothes that you just really don't identify with. This is about getting to be who you really are," she says.

"We're going to talk about everything. We're going to do a lot of fun things for the first time. We're going to go shopping for the first time. Maybe even some boy stuff, like ride a motorcycle -- because girls do that too," she adds. "It's going to be quite a journey. We're going to do some good."