For the occasion, Sophie opted for white trousers, a green blouse and a maroon jacket.
Following Covid regulations, the royal was seen carrying a pink face mask with a flower pattern.
The mother-of-two styled her blonde hair into an elegant updo.
For makeup, she opted for a natural look with eyeliner and mascara.
The Duchess of Cambridge wore a beautiful red coat dress and matching velvet heels.
READ MORE
She accessorised the look with her scarlet £640 Miu Miu bag.
Prince William matched Kate’s outfit wearing a suit with a red tie.
Other royals attended the event, including Princess Beatrice, Princess Eugenie and Zara Tindall.
Princess Eugenie donned a £1335 emerald green cape coat by Chloe and black boots.
Pippa Matthews looked beautiful in a long green coat and emerald earrings.
Kate’s brother James arrived with his wife Alizee, who stunned in a two-piece red and white tweed suit.
The Together At Christmas event in London is celebrated to honour the pandemic heroes such as charity workers, teachers and other volunteers.
The service included performances from stars Ellie Goulding and Leona Lewis.