Katie Price's daughter Princess is set to undergo an emergency operation on Monday (13.06.16) following a mystery hospitalisation.

Katie Price with her daughter Princess

Katie Price with her daughter Princess

Katie's eight-year-old daughter - whose father is her ex-husband Peter Andre - was rushed to hospital on Sunday evening (12.06.16) for an as-yet unknown ailment.

The 'Loose Women' star has now taken to her Twitter account to reveal Princess must go into surgery.

Alongside a photo of her kissing her child on the head, she wrote: "Waiting for my brave girl to have her operation (sic)"

On Sunday, Katie had a frustrating and frightening hour-long wait for the ambulance to arrive at her home to pick up Princess.

She wrote on Twitter at the time: "After a hour for ambulance to arrive at home earlier ! still in hospital so shocked what's happened my poor little baby being do strong (sic)"

Princess is having her operation on what is her brother Junior's eleventh birthday.

Peter has not yet posted anything on social media about Princess' condition but he did take to his Instagram account to share a photo of Junior along with the caption "happy 11th birthday my beautiful boy".

Katie also has son Harvey, 13, from her relationship with Dwight Yorke and Jett, two, and 22-month-old Bunny with husband Kieran Hayler.