Bruce Jenner is filming a new docuseries about the changes in his life.

The 'Keeping Up with the Kardashians' star, who has been the subject of rumours he is planning to undergo gender reassignment surgery, has reportedly been shooting footage with a camera crew over the last few months for the upcoming show that will air on E! later this year.

A source that the TV series will be very personal and will include interaction with the 65-year-old former Olympian's children and ex-wife Kris Jenner.

The insider told gossip website that Bruce has talked openly with his family about his future and Kris ''lost it'' at one point during an intense conversation.

But Bruce, who has daughters Kendall, 19, and Kylie, 17, and four stepchildren, Kourtney, 35, Kim, 34, Khloé, 30, and Rob Kardashian, 27, with Kris, as well as four other children, Burt, 36, Casey, 34, Brandon, 33, and Brody, 31, from previous relationships is relieved that they have all been ''extremely supportive.''

Another source told Us Weekly magazine that the docuseries will feature ''the Jenner family talking about Bruce 'coming out.' The world will see his full transformation.''

Kim recently predicted Bruce, who split from her mother Kris in 2013 after 22-years of marriage, would speak out about his ''journey'' when the ''time is right''.

She said: ''I think Bruce is very happy, the happiest I've ever seen him...He's our dad so we support him no matter what, and I think when the time is right, he'll talk about whatever he wants to talk about. I guess I'll kind of let everyone be curious and I feel like that's his journey to talk about.

''I think everyone goes through things in life, and I think that story and what Bruce is going through, I think he'll share whenever the time is right. I feel like that's his journey to talk about.''

The long-haired athlete - who underwent surgery to reduce the size of his Adam's apple last year - sparked rumours this week that he has increased the size of his lips via injections and was also recently spotted wearing nail polish.