The Duchess accessorised with a fur-trimmed hat and clutched a chic leather handbag that appeared to feature a crown motif.
To commemorate the royals 70th birthday, the Royal Family released not only a series of photographs to celebrate the momentous occasion, but was also captured in a brand new BBC documentary Prince, Son and Heir: Charles at 70, which showed just how much the royal adores his grandchildren.
The doting father-of-two also decided to share his views on what the Duke and Duchess of Sussex will name their first-born.
Speaking at the unveiling of a new royal portrait, painted by highly-acclaimed Australian artist Ralph Heimans, Charles quickly turned the conversation to the Duke and Duchess of Sussex.
“My son Harry tells me that during their recent tour of Australia he and his wife were offered thoughtful suggestions for the naming of their baby.”
"Just between us, I suspect Kylie and Shane may possibly make the shortlist," he jokingly told the audience.
"But ladies and gentlemen I would not hold your breath for Edna or Les."
Watch the moment below: