The King may be our head of state, but he's also a father and a grandfather to five grandchildren.
HELLO! takes a look at Charles's most affectionate moments ahead of the big day.
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Photographers captured this sweet greeting between the then future King and his daughter-in-law, the then-Duchess of Cambridge. they arrived at the world premiere of James Bond: No Time To Die in September 2021.
Charles once referred to Kate as his "darling daughter-in-law," while the Princess described her future father-in-law as "very, very welcoming, very friendly," when she was first introduced to Prince William's family.
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The Prince and Princess of Wales's youngest child, Prince Louis, stole the show with his cheeky antics at the Platinum Jubilee celebrations last year, and it was endearing to see his sweet bond with his grandpa Charles as he rushed to sit on his knee. The pair enjoyed a sway and a sing to the music.
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Relations between Prince Harry and his father and older brother may be strained at the moment, but here they are pictured in happier times.
This was a particularly proud moment for Charles as Harry launched his first-ever Invictus Games in London in 2014.
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Charles kissed his mother, the late Queen Elizabeth II's hand, as she presented him with a prize following a polo match in 1985.
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A warm embrace between father and son as they attended the 10th anniversary memorial service for the late Diana, Princess of Wales, in 2007.
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Charles and Camilla may have celebrated their 18th wedding anniversary last month, but the pair rarely show public displays of affection. Cameras caught this sweet moment between the pair at the polo in 2005, just months after they tied the knot.
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The Princess Royal's daughter, Zara Tindall, has always had a good rapport with her uncle Charles, and he greeted his nieces, Zara and Beatrice, with kisses and hugs at Royal Ascot last year.
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An adorable family moment between the then future King and his sons at the polo in 1990.
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Charles kissed his sister-in-law on the hand after she presented prizes at the polo in 1988. While Sarah, Duchess of York will not be among the guests at the coronation on 6 May, she has beeninvited to the concertat Windsor Castle on Sunday 7 May.
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A touching moment between Charles and his "dear papa," the late Duke of Edinburgh as they left the racecourse in 2014. The father and son shared a number of interests, including art, polo and the environment.
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A three-year-old Princess Beatrice greets her uncle Charles at the polo in 1991.
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The King also shares a warm friendship with some of the European royals, including King Felipe and Queen Letizia of Spain. The Spanish King even referred to the late Queen Elizabeth II as "Aunt Lilibet" in a touching tribute to the monarch following her death in September 2022.
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Queen Margrethe of Denmark was related to the late Prince Philip; they were cousins having both descended from Queen Victoria and King Christian IX, so the bond between the British and Danish royals is strong.
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