How Princess Diana's model niece became a celebrity overnight

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.

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Lady Kitty Spencer
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Lady Kitty Spencer
Lady Kitty Spencer arrives at St George's Chapel at Windsor Castle for the wedding of Meghan Markle and Prince Harry.
Lady Kitty Spencer (right) arrives at St George's Chapel at Windsor Castle for the wedding of Meghan Markle and Prince Harry.
Lady Kitty Spencer attending the Evening Standard Theatre Awards 2018 at the Theatre Royal, Drury Lane in Covent Garden, London. Restrictions: Editorial Use Only. Photo credit should read: Doug Peters/EMPICS
Lady Kitty Spencer attending the Evening Standard Theatre Awards 2018 at the Theatre Royal, Drury Lane in Covent Garden, London. Restrictions: Editorial Use Only
Lady Kitty Spencer attending the UK Premiere of A Star is Born held at the Vue West End, Leicester Square, London
Lady Kitty Spencer attending the UK Premiere of A Star is Born held at the Vue West End, Leicester Square, London. Photo credit should read: Doug Peters/EMPICS
Lady Kitty Spencer attending the UK Premiere of A Star is Born held at the Vue West End, Leicester Square, London.
Lady Kitty Spencer attending amfAR gala honoring Edward Enniful during Milan Fashion Week on September 22, 2018 at Societ� per le Belle Arti ed Esposizione Permanente in Milan, Italy. (Photo by Jonas Gustavsson/Sipa USA)
Lady Kitty Spencer attending amfAR gala honoring Edward Enniful during Milan Fashion Week on September 22, 2018 at Societ� per le Belle Arti ed Esposizione Permanente in Milan, Italy. (Photo by Jonas Gustavsson/Sipa USA)
Lady Kitty Spencer arrives at the V&A Summer Party at the Victoria and Albert Museum in London.
Lady Kitty Spencer arrives at the V&A Summer Party at the Victoria and Albert Museum in London.
Lady Kitty Spencer attending the Serpentine Summer Party 2018 held at the Serpentine Galleries Pavilion, Kensington Gardens, London.
Lady Kitty Spencer attending the private view of Frida Kahlo: Making Her Self Up exhibition, at the V&A, London. Picture date: Wednesday June 13th, 2018. Photo credit should read: Matt Crossick/ EMPICS Entertainment.
Lady Kitty Spencer arriving at the La Traviata VIP performance at the London Coliseum.
Lady Kitty Spencer arriving at the La Traviata VIP performance at the London Coliseum.
Lady Kitty Spencer arrives at the Walpole British Luxury Awards 2017 at the Dorchester Hotel in London.
Lady Kitty Spencer attends Marie Claire Prix de la Moda Awards 2017 in Madrid, Spain on November 7, 2017.(Photo by Gabriel Maseda/NurPhoto/Sipa USA)
Lady Kitty Spencer attending the Serpentine Summer Party 2017, presented by the Serpentine and Chanel, held at the Serpentine Galleries Pavilion, in Kensington Gardens, London. Picture Credit should read Doug Peters/EMPICS Entertainment
Lady Kitty Spencer at the Julien Macdonald Autumn/Winter 2017 London Fashion Week show at Goldsmiths' Hall, London. Photo credit should read: Doug Peters/ EMPICS Entertainment
Lady Kitty Spencer on the front row during the Julien Macdonald Autumn/Winter 2017 London Fashion Week show at Goldsmith's Hall, London.
Lady Kitty Spencer attending Centrepoint's Ultimate Pub Quiz Fundraiser 2017, held at Village Underground in Shoreditch, London. Money raised from the event helps to give homeless young people a safe place to stay, as well as vital support in improving their mental and physical health and finding a route into education or work.
Lady Kitty Spencer attending Centrepoint's Ultimate Pub Quiz Fundraiser 2017, held at Village Underground in Shoreditch, London. Money raised from the event helps to give homeless young people a safe place to stay, as well as vital support in improving their mental and physical health and finding a route into education or work. PRESS ASSOCIATION Photo. Picture date: Tuesday 7th February, 2016. Photo credit should read: Ian West/PA Wire
Kitty Spencer prepares to take part in a 'Sleep Out' fundraiser for Centrepoint, a chariy that helps young homeless people, at Greenwich Peninsula Quay, London.
Lady Kitty Spencer attending the IWC gala in honour of the British Film Institute at Rosewood Hotel in London. PRESS ASSOCIATION Photo. Picture date: Tuesday October 4, 2016. Photo credit should read: Ian West/PA Wire
Lady Kitty Spencer attending the BFI and IWC Gala Dinner held at The Rosewood Hotel, London Picture date: Tuesday October 4, 2016. Photo credit should read: Doug Peters/ EMPICS Entertainment.
Lady Kitty Spencer attending the Serpentine Gallery Summer Party, at Hyde Park in London. Photo Credit should read: Doug Peters/EMPICS Entertainment
Lady Kitty Spencer attends Historic Royal Palaces Kensington Palace Summer Party to raise money for the Royal Ceremonial Dress Collection, hosted in partnership with Harpers Bazaar US Editor Glenda Baile at Kensington Palace, London, June 30th 2016.
Lady Kitty Spencer arrives at the Serpentine Gallery Summer Party in Hyde Park, London. PRESS ASSOCIATION Photo. Picture date: Thursday July 02, 2015. Photo credit should read: Ian West/PA Wire
Lady Kitty Spencer arrives at the Serpentine Gallery Summer Party in Hyde Park, London. PRESS ASSOCIATION Photo. Picture date: Thursday July 02, 2015. Photo credit should read: Ian West/PA Wire
Lady Kitty Spencer attending a pre-Wimbledon Party hosted by Vogue and Ralph Lauren at the Kensington Palace Orangery, London.
Earl Spencer's daughters, Lady Amelia, Lady Eliza and Lady Kitty wait for the wedding ceremony for Prince William and Kate Middleton to start inside Westminster Abbey in London
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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.

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