The Duchess of Sussex celebrates her 37th birthday on Saturday – but is expected to spend it attending a society wedding.

Harry’s old friend Charlie van Straubenzee is marrying Daisy Jenks in Surrey and, according to reports, the duke and duchess will be among the guests.

The duke’s pal was an usher at Harry’s recent wedding, along with older brother Thomas van Straubenzee, and Charlie may have paid the royal the ultimate compliment by asking him to be his best man.

The Duke and Duchess of Cambridge are also rumoured to be invited to the couple’s big day as William is good friends with the van Straubenzee brothers, with Thomas a godfather to his daughter Princess Charlotte.

The Duke and Duchess of Sussex are expected to be among the guests at Charlie van Straubenzee and Daisy Jenks' wedding. (Arthur Edwards/The Sun)
The Duke and Duchess of Sussex are expected to be among the guests at Charlie van Straubenzee and Daisy Jenks’ wedding. (Arthur Edwards/The Sun)

Last year Harry reportedly whisked Meghan away for a romantic break in Africa to mark her 36th birthday, flying to Botswana.

The duchess’ big day will be the first time the former actress has celebrated her birthday as a member of the royal family.

She married husband Harry during a ceremony watched by an estimated television audience of hundreds of millions, and it was praised for combining tradition with modernity and diversity.

Sir Elton John, who performed at the wedding reception, described it as a memorable event and said: “To have a black gospel choir, a multiracial bride, a black cellist, who was wonderful, a preacher – it felt like a party, and it felt like progress had been made.

“Thank God, thank God.”

Sir Elton added: “I think the Queen had a lot to do with it. I think she’s been magnificent. It was a wonderful thing to be at.”

Meghan and Harry were able to enjoy their honeymoon without being discovered, jetting off to their undisclosed destination soon after they wed on May 19.

The husband and wife live in a property in the grounds of Kensington Palace but are rumoured to also have a country bolt-hole somewhere in the Cotswolds.