Bruce Jenner sex change: Kendall and Kylie want to know their father as a woman

After going public with his plans to transition into a woman, Bruce Jenner is now taking on the tough challenge of getting his children to accept the change.

In a forthcoming two-part E! special titled Keeping Up With The Kardashians: About Bruce, the 65-year-old star is seen having emotional conversations with each of his children.

A promo for the show, which airs on 17 and 18 May, shows his youngest child Kylie Jenner expressing her desire to get to know her father's Bruce's female side.

"We want to meet her," the 17-year-old said. "I do want to meet her when he is ready, when we're both ready."

Meanwhile, a protective Kendall Jenner struggled to hold back the tears as she revealed fears that she may lose her father, saying: "I don't like it when people say Bruce is going to be gone."

To which Bruce responds: "I'm not going anywhere."

Another segment from the teaser, which featured several flashback videos, also sees Bruce say: "You think someday, you're gonna get over it. These are my secrets that I have to deal with on my own."

Meanwhile, Kim Kardashian, who has previously voiced her support of her stepfather, said "We want to understand his struggle" as older sister Kourtney Kardashian revealed: "I think his biggest concern is he doesn't want to hurt us."

Other clips show a tearful Kris Jenner being comforted while discussing the breakdown of their marriage.

In April, the Olympic gold-medallist put an end to months of speculation about his increasingly feminine appearance during an ABC two-hour special with Diane Sawyer by boldly declaring: "For all intents and purposes, I am a woman."

"My brain is much more female than it is male. That's what my soul is. Bruce lives a lie. She is not a lie. I can't do it anymore," he explained.

"We're going to make a difference in the world with what we're doing. And if the whole Kardashian show and reality television gave me that foothold into that world, to be able to go out there and really do something good, I'm all for it. I got no problem with that."