The royal complemented her floor-length blue gown with a pearl and aquamarine choker necklace.
Earlier in the evening, Camilla covered up with an Amanda Wakeley black cape.
The busy royal had a jam-packed schedule that day, managing to fit in three engagements.
Camilla began her day by attending a service at Westminster Abbey to remember the life of former foreign secretary, Lord Carrington.
She then visited to the Royal Academy of Arts, where she viewed the newly opened learning facilities and met with people taking part in the program.
To round off her busy day, she attended a dinner for the English & Welsh wine industry at Vintners Hall in London.
All in a day's work!