We know the Duchess of Cambridge is quite playful and loves a joke. So it comes as no surprise that the mother-of-three wasn’t always on her best behaviour as a child.
According to Royal writer Christopher Andersen, Kate was given a nickname by her school friends for one antic in particular.
Just 16 at the time, the now 36-year-old apparently once flashed her ‘bottom to boys out the window.’
“She was so famous for this at the school she became known as Kate Middlebum,” Mr Anderson claims.

In the 2011 documentary Kate Middleton: Biography, former friend Jessica Hay, who also attended Marlborough College, went on to reveal that Kate “kind of got addicted to it” and showed of her behind “no fewer than 90 times” over the year.