But it looks like the duchess has an equally special relationship with her brother-in-law.
A sweet interaction between the two was captured last year during the Commonwealth Day service in March.
During the event, Sophie was seen cheerfully speaking to Charles before she shoulder-bumped him.
Royal fans were quick to spot the video and praised the duo’s sweet relationship.
One user wrote on X: “How cute is Sophie [heart eyes emoji] side bumping the King [King emoji]”, while another one said: “And people say King Charles is cold … see how Sophie lovingly bumped his shoulder? He is not cold. The RF is not cold.”
A third one commented: “Cute, they obviously have a great relationship.” while another one added: “Love the shoulder bump [heart eyes emoji] just proves they all have a close and relaxed relationship [clapping hands emoji]”.
A fourth user chimed: “Duchess of Edinburgh’s side touch to King Charles [heart face emoji] she’s adorable].
