It's the first time the duchesses have carried out an engagement together, without their husbands.
Tatler said the duchess felt like she was trapped with her increased workload during the coronavirus pandemic.
Judi James, body language expert, says Prince Harry showed signs he was self-comforting during the last official engagement.
The Duchess of Cambridge re-wears Alexander McQueen dress to first sustainable BAFTAs.
Duchess Kate and Prince William, both 37, visited the Hindu Kush mountain region near the Afghan border in northern Pakistan yesterday.
The Duke and Duchess of Cambridge vacation at least once a year in Mustique, a private island in the Caribbean.
Kate and William's eldest child proudly wears Three Lions on his shirt, in new photos to mark his sixth birthday.