The panel had been discussing things that can go wrong on your big day, such as saying the wrong name at the alter or a child piping up at that pivotal moment when the congregation is asked if anyone objects to the couple marrying.
Katie said: "I've been married three times and all different kinds: one was abroad, one was in Vegas, and with Pete was at Highclere, where Downton Abbey is filmed. Nobody knew I had really bad post-natal depression, so it is sort of kind of a blur. I wasn't on anti depressants then.
"I remember bits of the wedding. I don't wish I could go back and do it all again, I don't mean it like that. But it was such an amazing wedding. Everything about the fairytale I wanted."
When asked if Katie remembered more about her wedding when reading the glossy magazine that covered it, she replied: "Yes! Because we weren't allowed to go outside in case we got pictured or stuff. I still loved my dress."
Katie, 37, split from Peter in 2009 after three and half years of marriage. They are parents to son Junior, ten, and daughter Princess, eight. She documented their wedding and split in several of her autobiographies.
She wed cagefighter Alex Reid in Las Vegas in 2010 but they split the following year. Her marriage to third husband, Kieran Hayler, took place in Barbados in January 2013. They are parents to son Jett, two, and daughter Bunny, one.
Katie is also mum to son Harvey, 13, from her relationship with Dwight Yorke.