Fans of Britney Spears slammed her ex-husband Kevin Federline in the wake of his announcement he was penning a tell-all about the pop superstar titled You Thought You Knew. 

Federline, 47, irritated loyal supporters of the Grammy-winning singer, 43, as he promised in a news release his book would reveal ‘extremely intimate and transparent’ details about their ‘highly publicized marriage.’

Federline said of his upcoming book, ‘I achieved my biggest dreams, dealt with crushing heartbreak and endured constant ridicule, all while becoming the father my children needed as they experienced non-stop emotional turbulence.’

Federline, who was wed to Britney from 2004 thru 2007, added that ‘if you’ve ever had questions, you’ll find answers here.’

But loyal supporters of the …Baby One More Time songstress – who shares sons Sean Preston, 19, and Jayden, 18, with Federline – weren’t interested in the book, which is slated to be released October 21.

Daily Mail has reached out to Federline via Instagram for comment on the backlash to the release of the forthcoming book.

Fans of Britney Spears, 43, slammed her ex Kevin Federline, 47, in the wake of his announcement he was penning a tell-all about the pop superstar

The former couple was married from 2004 until 2007, and share two sons

Fans of Spears took exception with Federline for rehashing his past with the Womanizer artist in what they felt was a blatant cash grab.

‘So, no one would buy his story, so he thinks people want to hear him read his notes app life story?’ asked one user, while another said, ‘Damn, he REALLY needs money!’

One user on X referenced another of the Lucky singer’s famous exes in slamming Federline.

‘Instead of writing fanfiction novels he should go back and tour with Justin Timberlake so they can both cry endless rivers,’ the user said. ‘It’s tiring.’

In addition to his sons with the Oops!… I Did It Again vocalist, Federline is father to daughter Kori, 23, and son Kaleb, 21, with actress Shar Jackson, 48.

He is also father to daughters Jordan, 13, and Peyton, nine, with his wife, former volleyball player Victoria Prince, 42.

One X user said of Federline’s ties to show business: ‘He was a dancer, knocked up 2 celebrities, abandoned the 1st one and their kids while she was still pregnant then married the more famous one and took her kids for the child support money.’

One user on X alluded to another Britney ex, Justin Timberlake, in slamming Federline

Multiple social media users made clear they had no interest in reading Federline’s memoir

Federline rode the wave of notoriety from his marriage to the A-list songstress into a pro wrestling stint in which he feuded with iconic WWE star John Cena. Pictured in 2007 in Miami

Some fans expressed concern Britney could be emotionally impacted for the worse with her ex-husband bringing their past dirty laundry back into the public consciousness.

‘Ah great…another person reopening her wounds and bringing more judgement her way,’ a Britney fan said.

One Britney fan referred to the 2022 book penned by her sister Jamie Lynn Spears, Things I Should Have Said.

‘Guess he didn’t see what happens when Jamie Lynn attempted to mooch off Britney w her book,’ the fan said.

Federline in the book also will detail his time as a dancer for Michael Jackson, Destiny’s Child and Pink, according to the news release.