Of course, the drink was well deserved after her busy day of events.
Camilla started off the day by attending a service at Westminster Abbey to remember the life of former foreign secretary, Lord Carrington.
The Duchess looked chic and respectful in a black coat dress which she accesorised with a black velvet hat and pearl jewelry.
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.
The duchess was sporting a purple skirt suit and rugged up from the cold with a black cape jacket. She carried a small black purse and wore black leather gloves with fur trimming.
After a busy day, we hope the duchess enjoys a well-earned sleep in!