Kate and her husband Prince William were guests at the ceremony, which took place at Chelsea Old Church - situated on the same road where the Duchess previously lived at the former Middleton family home in west London.
The mother-to-be looked elegant in a floor-length black lace gown, as she wrapped up warm with a red tartan scarf, hiding her blossoming baby bump.
Kate's frock looked to be the same as the dress she wore to attend the star-studded Royal Variety Performance last month. Click link for full post from EXPRESS.