Other guests included Beatrice’s mother Sarah Ferguson, the Duchess of York, sister Princess Eugenie, Kate Middleton's sister Pippa Middleton and her husband James.
The Duchess of Cambridge's brother James and his fiancee Alizee Thevenet were also snapped arriving at the event.
In other news it has been revealed that Beatrice and Edoardo have settled on a wedding date.
The couple are said to have consulted with the Queen who agreed to let the royal make the announcement in the New Year.
"Bea and Edo will finally announce their wedding date in the second week of January,” a source told the Mail on Sunday.
"The date has been described as “early summer”, just before the summer social season kicks off."
Early summer in the UK means that we can expect the couple to say “I do” around early June.