The 40-year-old television personality split with her estranged husband - with whom she has four-year-old son Jett and three-year-old daughter Bunny - in August 2017, and has now admitted that in order to ease the stress put on her brood by the split, 10-year-old Princess and 13-year-old Junior are now living with their father and Katie's ex-husband Peter.
A spokesperson confirmed to Mirror Online that Katie - who is also mother to 16-year-old son Harvey - and Peter ''agreed it best'' for their children.
They added: ''What is important [is] that the focus is on what is best for the children during tough times as Peter has acknowledged. Katie is a remarkable mother, Peter is a wonderful father, together they are doing what is best for their children.''
The news comes after 45-year-old Peter - who also has daughter Amelia, four, and son Theo, 18 months, with second wife Emily MacDonagh - insisted he was setting up a ''stable home'' for Princess and Junior.
He said: ''J and P have gone, and will go, through tough times in their lives. But no matter what, Emily and I will always provide a stable home for them. People can read in to that how they like. We have a lot of routines and I'm really strict on school nights.''
Meanwhile, last month, it was confirmed that Kieran has moved out of Katie's home after she thanked him on social media for visiting the house when he dropped off a cake for Harvey.
Sharing a picture of a cake Kieran's mother Wendy made for Katie's son Harvey, she wrote on Instagram: ''Thankyou @wendyhayler04 for Harvey's birthday cake you made it's amazing and thanks kieran for dropping it off (sic)''
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