In his wedding speech Prince Charles described the Duchess of Cambridge as "the daughter I never had".
And it's clear that Camilla is taking on something of a mother role to Catherine as she adjusts to her new royal role.
Watching the two interact this week at the Garter Day celebrations – their wide smiles and their easy manner with each other – it's clear how close they've become.
In the run up to the royal wedding, the Duchess of Corwall was spotted giving Kate pointers over lunch.
And now she is at Kate's side as the new royal gets used to public events, guiding her every step of the way.
Photo: © Rex Features