King Charles and the Princess of Wales have developed a very special bond over the years, which has only strengthened since he described her as his "darling daughter-in-law".
The pair have stepped out on numerous royal engagements together, giving an insight into their relationship through private jokes and affectionate cheek kisses.
" Kate and Charles do seem to have a rather special relationship that shows up visibly in public as the pair seem to single each other out for attention and empathetic signalling," behavioural expert Judi James told the Express.