Following her stint on I’m A Celebrity… Get Me Out Of Here! last year, she revealed Derek had proposed to her again off-camera.
She told You Magazine in January: “When Derek came to meet me after I left the jungle, he was planning to propose to me again [in front of the TV cameras], but he got overwhelmed and burst into tears.
“The kids leapt out and surprised me and Darcey said, ‘Oh Dad – you didn’t do it!’
“So he got down on one knee and proposed… and I said yes, obviously.”
Kate will return to Good Morning Britain on Wednesday.