E! just released an emotional promo teasing the upcoming two-part special, Keeping Up with The Kardashians: About Bruce, which begins airing Sunday, May 17 at 9pm ET/PT.
In the gut-wrenching, one-minute clip, Bruce reaffirms that throughout his journey, his biggest concern has always been family.
"I don't ever think I've been as scared in my life as I was to be extraordinarily honest with my kids," Bruce admits.
The spot shows candid homemade footage from Bruce's life, and also teases the concerns of the Kardashian and Jenner sisters.
In one touching moment, a crying Kendall laments, "I just don't like when people say Bruce is gonna be gone."
"I'm not going anywhere," says Bruce.
"I do want to meet her when he's ready. When we're both ready," Kylie adds.
If this first look is any indication, the eye-opening look into Bruce's transition isn't one you will want to miss.
Watch the biggest revelations from Bruce Jenner's 20/20 interview.