During His Majesty's state visit to Kenya in November, Charles referred to Kate as his "beloved daughter-in-law" during a speech as he spoke of his family's connections to the East Africa country.
Kenya was where Prince William proposed to his university girlfriend Kate Middleton in 2010.
When asked about being introduced to the royal family in her engagement interview, the future Princess revealed: "I was quite nervous about meeting William's father, but he was very, very welcoming, very friendly, it couldn't have gone easier really for me."
With the King once describing Kate as his "darling daughter-in-law," their admiration and respect for one another is evident.
Take a look at Kate and Charles's sweetest moments through the years.
Check out HELLO!'s A Right Royal Podcast. In this week's episode, we're talking about Prince Harry and Meghan Markle's new life in California...