Katie, who is six months pregnant, was due to appear on the ITV1 lunchtime show as a guest panelist today but cancelled after claims that her husband Kieran Hayler has been cheating on her.
An ITV spokesperson confirmed to Reveal that she told them she would not be taking part yesterday morning (8 February), just as news of the alleged affair broke.
Soon-to-be mum-of-five Katie stunned fans yesterday after announcing on Twitter that she is to divorce Kieran just 16 months after they married in the Bahamas.
Katie claims that he has been having a "full blown sexual affair" with her friend Jane Pountney and has branded her a "wh*re" and Kieran "disgusting".
Neither Jane or Kieran have commented on the allegations, however Jane's husband Derrick has denied the affair, insisting that it was simply a "storm in a teacup" sparked by a "drunken kiss".
Yesterday, following her Twitter outburst, Katie was pictured arriving at Jane and Derrick's home in West Sussex, followed by Kieran. The foursome then reportedly had a "showdown" inside the house with the curtains closed.
Later, Katie released a statement, telling her fans that her "heart is breaking". She said: "I make no apologies for them though it will be appreciated that, sending them immediately after Kieran confirmed to me what he had been doing for the last 7 months, those tweets were a sign of my heart breaking."
Katie added: "That he was doing it with a close friend of nearly 20 years is hard to understand."
Following the news, Katie's fans and celebrity friends have been sending her messages of support, including Rylan Clark, who met the star on her reality show Signed By Katie Price.
Even Alex Reid, who married Katie in 2010 before splitting with her less than a year later, has come forward and said he will "be there" for his heartbroken ex if she needs him.
Within months of meeting, Katie and Kieran married on the beach in the Bahamas in January 2013. They welcomed their first child together, a son called Jett, eight months ago.
On Sunday, Katie confirmed that she is unexpectedly six months pregnant with their second child.
Katie Price: Past relationships:
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