Also in attendance were Beatrice’s grandparents Queen Elizabeth II and Prince Philip, and her sister Princess Eugenie.
The Queen even loaned Beatrice a vintage dress for the occasion.
She also wore a diamond fringe tiara which her grandmother wore on her own wedding day in 1947.
Announcing the happy news on social media, the Royal Family’s official Instagram account published a photo of the happy couple as well as Prince Philip and the Queen.
The caption read: “Congratulations to HRH Princess Beatrice and Mr Edoardo Mapelli Mozzi!
“The couple were married in a small private ceremony at the Royal Chapel of All Saints at Royal Lodge, Windsor on Friday 17th July.
