The Sun on Sunday claims that Katie discovered she was expecting after falling ill while on holiday with her children and husband Kieran Hayler - only to discover she was already six months pregnant with what will be her second child to her husband of just over a year.
A source told the newspaper: “It’s not something they had planned this soon after Jett, but they’re still delighted.
“The news came as a complete shock. Katie’s already in her second trimester so has been pregnant for nearly six months without even realising. She’s due later this summer.
"Unlike her other four pregnancies she’s yet to have any cravings and is not showing much, either."
Katie already has four children to footballer Dwight Yorke and ex-husband Peter Andre, as well as Kieran, a builder and occasional stripper she married in a secret ceremony in the Caribbean January last year.
She’s previously spoken about her desire to extend her ever-growing family, telling Eamonn Holmes and Ruth Langsford on ‘This Morning’ back in October: “[I want] as many [babies] as my body can have, with cesareans, maybe another four if I can.”
The Sun on Sunday’s source added: “Katie’s always wanted a big family and a fifth baby’s just another part of that. Kieran wants the same thing too.
“Katie’s 35 now, so it’s no surprise she has fallen pregnant so quickly after Jett. She wants eight children in total, so this pregnancy is definitely a step in the right direction.”