Kate Middleton and Prince William celebrated St. David's Day, a day of national celebration for Wales.

They honored the Welsh Guards in Windsor during the St. David's Day Parade.

Prince William visited the Welsh Guards for the first time since becoming ceremonial Colonel.

At a customary St. David's Day march, William & Kate gave the regiment's commanders & guardsmen leeks.

The ceremony ended with the Prince of Wales taking the royal salute as the troops marched past.

William and Kate then met regiment families and 5th Royal Australian Regiment (5RAR) personnel in the U.K.

This event mirrors the duty that Kate carries out most years on St. Patrick's Day.

The event was part of a Wales-themed week for the royal couple.

William and Kate have a special connection to Wales as it's where they lived as newlyweds and first-time parents.