A small number of guests were also there, Buckingham Palace has confirmed.
The coronavirus lockdown meant there was little fanfare to mark the occasion for Her Majesty.
The leader of Monaco and Prince of Wales attended the same event on March 10.
The royal and her fiancé, Edoardo Mapelli Mozzi, are nixing their Buckingham Palace garden reception.
Buckingham Palace announced major changes to Queen Elizabeth's schedule.
The Duke and Duchess of Sussex released behind-the-scenes pictures from an upcoming project.
He also let one woman wave from the balcony of Buckingham Palace, the Daily Beast reported Monday.
The FBI wants to hear from the Duke of York over his ties to the late sex offender Jeffrey Epstein and a related rape allegation.
It'll be a spring ceremony for Prince Andrew's daughter and Italian real estate magnate Edoardo Mapelli Mozzi.
The Duke and Duchess of Cambridge hosted a reception at Buckingham Palace Monday night.