Kevin Federline has been accused of 'cashing in' on ex-wife Britney Spears as his tell-all book on the singer hit shelves this week.

The American dancer and actor, 47, appeared on ITV's This Morning on Thursday following You Thought You Knew's release on October 21.

In the book, Kevin has made a string of accusations towards his former spouse, including claims that her their two sons would wake up to find her holding a knife.

During his remote appearance on British daytime television, Kevin was asked by Cat Deeley if now was the right time for its release, given Britney 'looks incredibly vulnerable'.

He replied: 'I think that this is the perfect time to release this because I think that the time, the clock is ticking on this, right?

'And this book is, is not only me being able to tell my story and bring the truth to light, but it's also a cry for help, like I said, that's what we do for the people that we care about, right?

Kevin Federline has been accused of 'cashing in' on ex-wife Britney Spears as his tell-all book on the singer hit shelves this week

The American dancer and actor, 47, appeared on ITV 's This Morning on Thursday following You Thought You Knew's release on October 21 (pictured in 2006)

'And she is vulnerable right now, and it's a horrible situation that I'm witnessing and the world is witnessing, but the situation that has been created out of this, it's like we've tried everything else.'

Kevin was thrust into the limelight when he and Britney married in 2004, and after welcoming sons Sean Preston, 19, and Jayden, 18, they split two years later.

He continued to Cat and Ben Shephard: 'We've tried to go behind the scenes. We've tried so many different things, interventions, rehab, all of these things over the years and nothing has worked, you know.

'So now it's like I'm crying to the public to like step up and make this plea, because nobody can come in here and do anything. Like nobody can force her to do anything.

'The decision is on her now. And I feel like if the public could just get behind my sons and get behind what I'm trying to do here, we're pleading with her to take the first step, we're pleading with her.'

Following his appearance, furious Britney fans flooded social media as they accused Kevin of 'cashing in' on her woes.

One said: 'I object to #ThisMorning giving airtime to Kevin Federline. Red neck grifter. #Britney.'

A second wrote: '"Disgusting from @thismorning interviewing a loser wanting to cash in on Britney Spears...vile. Leave her alone ffs.'

Kevin was thrust into the limelight when he and Britney married in 2004, and after welcoming sons Sean Preston, 19, and Jayden, 18, they split two years later (pictured in 2006)

During Britney's mental health struggles, which led to her being hospitalised, Kevin was given full custody of their two sons

Devastated Britney revealed recently that she's seen one of her sons for only '45 minutes in the past 5 years' (pictured in 2013)

'Professional Leech Kevin Federline, whose career is still cashing in on Britney....@thismorning,' said a third.

While a fourth commented: 'Britney has been exploited her whole life, by people that should've loved and cared for her, starting with her parents, but even they should've and could've stepped in to stop this leech from getting his claws into her.'

During Britney's mental health struggles, which led to her being hospitalised, Kevin was given full custody of their two sons, and in his book, he also shared his concern for the singer's wellbeing.

The singer has previously hit back at Kevin's comments in a scathing social media post, accusing him of 'gaslighting' her, and claiming she feels 'demoralised' about the fractured relationship with her two boys.

Devastated Britney added that she's seen one of her sons for only '45 minutes in the past 5 years.'

'Relationships with teenage boys is complex. I have felt demoralized by this situation and have always asked and almost begged for them to be a part of my life.'

'Sadly, they have always witnessed the lack of respect shown by own [sic] father for me,' Spears went on.

'They need to take responsibility for themselves,' she added.

The singer has since hit back at Kevin's comments in a scathing social media post, accusing him of 'gaslighting' her

Britney recently said how she is the one who 'gets hurt' from the 'white lies' in Federline's tell-all book

Read More Britney Spears unleashes on ex Kevin Federline AND her SONS

The Grammy winner lamented how little she has seen her sons, declaring that she will now be the one to set the rules for their visits.

'With one son only seeing me for 45 min in the past 5 years and the other with only 4 visits in the past 5 years. I have pride too. From now on I will let them know when I am available.'

Spears continued, adding that she is the one who 'gets hurt' from the 'white lies' in Federline's tell-all book.

'Trust me, those white lies in that book, they are going straight to the bank and I am the only one who genuinely gets hurt here.'

The Baby One More Time singer concluded her statement with love for her two boys.

'I will always love them and if you really know me, you won't pay attention to the tabloids of my mental health and drinking.'

Kevin Federline accused of 'cashing in' on Britney Spears