Prince George and Princess Charlotte were a surprise addition to Kate Middleton and Prince William's outing to Wales on Saturday. 

Kicking off the third day of the Platinum Jubilee celebrations, the Cambridge family (minus Prince Louis, who was likely deemed too young for the visit!), visited Cardiff Castle to take in the local celebrations being held in honor of Queen Elizabeth.

The day is especially poignant for 8-year-old George, whose visit mirrors his father's first official trip to Wales when he was the same age. Back in March 1991, he joined his mother Princess Diana in Cardiff. The excited crowds handed the young prince daffodils — the Welsh national flower — as he went on a walkabout outside Llandaff Cathedral. 

Their appearance in Wales underlines one of the main objects of the Jubilee weekend — to not only celebrate the Queen's 70-year reign, but to also to stress the future and the succession of the monarchy. In George and William, we have two future kings and two future Princes of Wales.