Princess Kate marks St. Patrick's Day after cancer battle: See her festive green outfit.

Princess Kate marks St. Patrick's Day after cancer battle: See her festive green outfit.

Princess Kate is feeling inexperienced this St. Patrick's Day.

The Princess of Wales, 43, took section in the Irish Guard's parade at Wellington Barracks in London to mark the excursion Monday.

Tags: Queen, Prince Charles, Camilla, Prince Louis, Prince William and Kate Middleton, Prince Charles, Prince Harry, Meghan, Lilibet

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