How Princess Diana's model niece became a celebrity overnight

A Star is Born UK Premiere - London
A Star is Born UK Premiere - London

Lady Kitty Spencer became an overnight Instagram star after she was photographed at Prince Harry and Meghan Markle's wedding last year.

The 28-year-old model is the niece of Princess Diana, and first cousin to Prince Harry and Prince William.

Spencer revealed to Harper's Bazaar she gained nearly half a million Instagram followers overnight after the wedding.

Find out more about her rise to fame in the video above.