In a fascinating display of patriotism, Kate Middleton and Prince William celebrated St. David's Day, a holiday in Wales.

They paid tribute to the Welsh Guards, presenting leeks during a traditional march.

Prince William's first visit as ceremonial Colonel surprised the Welsh Guards.

The event ended with Prince Charles saluting the troops, a surprising show of support.

William and Kate's presence surprised the attendees, who also met regiment families and Australian personnel.

This week-long Wales-themed event, filled with surprises, was reminiscent of Kate's annual St. Patrick's Day duty.

Their intense interest in Welsh culture was a surprising revelation.

Wales holds a special place in the couple's hearts as newlyweds and first-time parents, adding to the event's surprises.

Overall, the fascinating story of William and Kate's surprising display of Welsh pride was an unexpected delight.