As Princess Lilibet celebrates her third birthday, fans continue to state she is her dad's double. Royal fans previously pointed out baby Lilibet's uncanny resemblance to Prince Harry following the release of an image to mark her first birthday. The Duke and Duchess of Sussex's daughter, known as Lili, was captured smiling and dressed in a pale blue frock with a white bow in her hair at a birthday picnic thrown for her at Frogmore Cottage .

Harry and Meghan released the picture, taken by photographer and friend of the couple Misan Harriman shortly after celebrating her first birthday and social media users quickly noted the striking similarities between the tot and the Duke. They also compared the image to that of Harry as a one-year-old and joked the royal had "cloned himself". For all the latest on news, politics, sports, and showbiz from the USA, go to The Mirror US .

READ MORE: Prince Harry rejected King Charles' birthday idea for Princess Lilibet One person wrote: "Lilibet Diana looks like her papa, Prince Harry," while another posted two snaps of the pair with a matching head of red hair and said: "Prince Harry and his daughter Lilibet photographed at the same age." A third added after the youngster's image was released: "Prince Harry cloned himself. Happy birthday Lilibet Diana," alongside a smiling emoji, while a fourth penned: "If she isn't the spitting image of her dad, red hair and all.

" Close family and friends were invited to celebrate the one-year-old's birthday.