The 28-year-old was thrusted into the spotlight after appearing at the wedding of her cousin, Prince Harry, to Meghan Markle in May.
Kitty attended the highly publicised event sporting a hand-painted green Dolce & Gabbana dress.
In an interview with Harpers Bazaar, she said: “It was definitely unexpected.
“[My Instagram followers] went from 17,000 to half a million in one night.
“I thought I had someone else’s phone when I woke up the next morning.
“I had to turn my notifications off because my phone was going to die.”
And she added: “Can I still FaceTime my cat and put it on my Stories?”
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