Born on 15 June 2015, Nicolas Paul Gustaf was born as the second child and only son of Princess Madeleine of Sweden and Chris O'Neill.
Nicolas has two sisters: Princess Leonore (b. 2014) and Princess Adrienne (b. 2018). He is ninth in line to the Swedish throne.
He was the first grandson and third grandchild for King Carl XVI Gustaf and Queen Silvia.
Nicolas lives in Miami with his family but spends a lot of the summer in Sweden.
Photo: Erika Gerdemark/Kungahuset.se
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