Meanwhile, his wife, Duchess Sophie did not attend the King’s bash either as she visited Rochester Cathedral.
It has not been confirmed whether Prince Andrew attended the party, however his wife Sarah Ferguson wished the King a happy birthday on Instagram by uploading a throwback picture of him.
She captioned the snap: “Wishing the happiest of birthdays to His Majesty, King Charles III. Long live the King.”
Tuesday was a working day for the monarch, who hours before his dinner party launched the Coronation Food Project when he a food distribution hub in Oxfordshire alongside his wife, Queen Camilla.
The project will support food networks across the UK to reuse greater amounts of surplus food.
Charles also hosted a reception at Buckingham Palace to highlight the work of nurses and midwives over the decades as part of the NHS 75 celebrations.
The monarch kickstarted his birthday celebrations on Monday by visiting a special tea party at Highgrove Gardens.