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Prince George is looking more grown up than ever in his brand-new birthday portrait<\/a>.<\/p>\n The future king<\/a> celebrates his 13th trip around the sun today, which his parents, Princess Catherine<\/a> and Prince William<\/a>, celebrated with a new series of posts on their personal Instagram account. (You can check out last year\u2019s birthday portrait here<\/a>.)<\/p>\n \u201cHappy 13th Birthday, George! \ud83c\udf89,\u201d the Prince and Princess of Wales wrote under a photo of the now-teenager.<\/p>\n In the portrait, George is seen wearing a navy, single-breasted suit, a sophisticated ensemble seemingly meant to signal his increasingly mature age, as past birthday portraits have seen him wearing more casual pieces like vests<\/a>, button-up shirts<\/a>, and polos<\/a>.<\/p>\n As he stands on a stairwell, the birthday boy leaves his jacket hanging open to reveal a crisp white dress shirt underneath, which he styles sans a tie\u2014a look frequently seen<\/a> on his father, William.<\/p>\n Along with the portrait, the family also shared a video<\/a> of George participating in activities like hiking, beach games, boat rides, and more. \u201cThank you for all the birthday wishes for George today!\ud83c\udf82,\u201d the caption read.<\/p>\n Currently, Prince George is second in the line of succession to the throne<\/a>, behind his father, who will take the crown when King Charles III<\/a> eventually passes.<\/p>\n This fall will mark a big change for the eldest Wales child, who will start at Eton College, the same boarding school attended by his dad, and uncle Prince Harry<\/a>. It will be George\u2019s first time going to school without his younger siblings: Princess Charlotte<\/a>, 11, and Prince Louis<\/a>, 8.<\/p>\n It will certainly be a year of big changes for the young royal. Happy birthday, Prince George!<\/p>\n<\/div>\n