Both Peter, 48, and Harriet are on their second marriages. Peter divorced Autumn Kelly in 2021 and shares daughters Savannah, 15, and Isla, 14. Harriet, formerly married to fitness instructor Antonio St. John Sperling, has a 13-year-old daughter, Georgina — the three young women appeared as bridesmaids.
The couple first drew attention after appearing together at the Badminton Horse Trials in May 2024, announced their engagement in August 2025, and confirmed the wedding date this spring. Peter is the first of Queen Elizabeth's grandchildren to remarry.