Kate, Princess of Wales wore a custom-made teal coat dress by Catherine Walker & Co. for St. Patrick's Day 2023.

The coat dress was designed to match the Irish Guards' feathered plume color, known as St. Patrick's blue.

Kate is now the honorary colonel of the Irish Guards, taking over from Prince William in December 2022.

William is now the honorary colonel of the Welsh Guard, as he is now Prince of Wales.

William praised his wife, calling her a "committed, focused, and already incredibly loyal 11th colonel."

Kate took her first royal salute as colonel during the St. Patrick's Day event.

She pledged her commitment to the role, stating that she is there to listen, support, and champion the Irish Guards.

Kate's coat dress had defined shoulders, a straight skirt, and a belted waist.

She wore a fascinator, emerald drop earrings, and the Irish Guards' shamrock pin.