'She is full of s***': Caitlyn Jenner cringes as biographer Buzz Bissinger denounces Kris Jenner on chat show

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Caitlyn Jenner's biographer said Kris Jenner was 'full of s***' and has only been slamming her new memoir to gain storylines for Keeping Up With The Kardashians.

Pulitzer Prize-winning journalist Buzz Bissinger, 62, spoke in defense of Caitlyn during an appearance Tuesday on Late Night With Seth Meyers.

Kris was shown during Sunday's episode of the family's E! reality show telling her daughers of the memoir: 'I read it and basically the only nice thing she had to say was that I was great socially at a party one time'.

New book: Caitlyn Jenner appeared on Late Night With Seth Meyers on Tuesday to promote her new memoir

Bissinger, who won a Pulitzer in 1987 for investigative reporting in Philadelphia, cut off Caitlyn when Seth asked her about Kris's complaint of her portrayal.

'Kris, I don't know how to say this, she is full of s***, she is full of s***,' said Bissinger who co-authored Jenner's book The Secrets Of My Life that was released this week.

Bissinger then listed several positive things that Caitlyn had written about his ex-wife in the book – including references to their love, her parenting skills and business acumen.

Kris Jenner, 61, has maintained that Caityln's transition came as a huge shock to her. 

Reality star: The 67-year-old reality star  just released her memoir The Secrets Of My Life

'If you were with someone who had breasts from hormones, who was taking hormones and later had to have those breasts removed, wouldn't you start to think that something was up with that person?' scoffed Bissinger, who appeared with Caitlyn Jenner on Late Night with Seth Meyers on Tuesday night.

'So I don't know what she's talking about except that it's fodder for her fr*cking show, that's what I think,' continued Bissinger, who wrote the 1990 nonfiction book Friday Night Lights that was adapted for TV and film.

'We really worked to not be mean spirited [In the book], to be honest and I feel that was accomplished' said Bissinger. 

Advanced copy: Kris was not pleased with her depiction in Caitlyn's memoir on Sunday's episode of Keeping Up With The Kardashians after reading an advanced copy

As Bissinger blasted the famed 'momager', Caitlyn Jenner was cringing.

'Ahhh, can I speak?' she asked, before making a diplomatic statement about the couple's long and prosperous marriage and how there are two sides to every story.

Bissinger was wearing a studded leather jacket and low-necked t-shirt.

Top journalist: The Pulitzer Prize-winning writer, known for his non-fiction book Friday Night Lights, also wrote the 2015 Vanity Fair piece about Caitlyn announcing her transition

'When I first met him he was wearing a shirt and tie, then after two years, literally two years, I've opened up his entire life, he's now his authentic self,' joked Jenner.

'I like to cross dress,' revealed the author.

Earlier in the interview Jenner had discussed how the autobiography came to be. 

Conservative politics: Caitlyn explained that she's been a longtime supporter of the Republican Party but her loyalty is with the transgender community

'It's 65 years in the making…thousands and thousands of pages of memoirs, of talking about everything. The most important thing, for me, in doing this book was honesty, I had to be as honest as I possibly could,' said the 67-year-old, who used to be known as the Olympic athlete Bruce Jenner.

'I told things in this book that my family didn't know I was doing, I didn't even know what I was doing!' she added.

'It was a long struggle, but it's funny, I tried to keep humor in it because I think humor is extremely important,' she said.

Trump talk: Caitlyn voiced her displeasure with Trump over his withdrawal of federal guidelines for Title IX by the Obama administration protecting transgender students

'This is such a marginalised community,' Caitlyn continued, noting the high rate of suicides among trans people.

Jenner admitted that she was largely ignorant of the community until after her transition.

'I had never even met another person who was trans,' she said, noting that she'd worked hard to learn the appropriate vocabulary. 

Ultimate double: Seth congratulated Caitlyn after she pointed out winning the 'ultimate double' of the Olympics and Glamour's Woman of the Year Award

When Meyers called her out for voting for President Donald Trump she said: 'Oh god did I?'

'Obviously the Republican Party does not do a good job when it comes to equality and the entire LGBT community, the Democrats are better there'.

'I believe in minimal government,' she continued. 

Made mistakes: Caitlyn admitted making mistakes that angered the transgender community

'My loyalty is not with Donald Trump…my loyalty is with my community and I will fight for this community,' she added.

'There are other people within his administration…Jeff Session is one of them, very anti-LGBT…another guy Mark Green, who they're putting in for secretary of the army, has said that trans people have a disease. I don't have a disease,' she explained with a chuckle.

Meyers asked if Trump had asked her to play golf with him. 

Ghost writer: Buzz Bissinger, 62, who ghost wrote the memoir joined Caitlyn on the show

'Yeah, and I haven't done it because I don't think he wants to get beat by a 67-year-old trans woman, the man has an ego,' she laughed.

The book is not written in a linear format, but flips back and forth through time.

'I want to make it clear this is Caitlyn's book, I'm kind of the midwife, I used my technical skills to put it together,' said Bissinger.

Talking politics: Seth Meyers asked Caitlyn about voting for Donald Trump

In the tome Jenner said that sport, marriage and family life were a 'diversion' from her problems - a comment that infuriated her children.

'I got in trouble with my family because I said they were a diversion and they were all, 'Oh, so that's why you had us, for a diversion?'' And I go ''No, no no''.'

'It was a diversion from myself,' she explained.

'So I'd never have to deal with myself'. 

New release: Caitlyn's new 336-page memoir The Secrets Of My Life was released Tuesday