The Duchess of Cambridge opted for a beautiful green dress coat and brown hat for the Irish Guards Parade at Mons Barracks in Aldershot earlier today.
The Duchess of Cambridge on official St Patrick's Day engagement. Photo: PA
Duchess Kate also wore a shamrock brooch, which was once the proud possession of the Queen mother.
The Duchess of Cambridge wears the Queen Mother's shamrock brooch. Photo: PA
During the ceremony, the Duchess presented shamrocks to the soldiers (causing one to faint!) in honour of St Patrick's Day. It was the first solo military engagement for the future Queen.
Look back at more Kate Middleton style moments below: