Hundreds of thousands of people packed the streets of Dublin on Monday to watch Ireland's national St. Patrick's Day parade, as crowds in green flooded cities and towns across the country to mark the annual holiday.

Children waved the Irish tricolour while visitors watched the long and energetic parade make its way through the streets of Dublin as Ireland celebrated its patron saint on Monday. Children, adults and visitors from across the world packed the city centre to see the headline parade and to celebrate the festivities of St Patrick’s Day.

Dublin celebrated St. Patrick's Day with a vibrant parade attracting hundreds of thousands of spectators, featuring colorful floats and performers. Kate, Princess of Wales, marked the holiday with the Irish Guards in London,