Catherine Middleton celebrated St. Patrick's Day with a visit to the 1st Battalion Irish Guards. She looked gorgeous and holiday-appropriate in a green dress coat and stylish brown hat, plus a gold shamrock pin that was previously worn by Queen Elizabeth . WATCH the video above for the full look!

The Duchess of Cambridge also proved Monday that she's more than a beautiful face, making her first public speech since joining the royal family (watch it here ). She spoke at a children's hospice in Ipswich, England, graciously apologizing that Prince William could not be there.

Check out more photos of Middleton's St. Patrick's Day attire: