She entered the chapel at Windsor Castle to marry financier Thomas Kingston after stepping from a claret-coloured vintage car, accompanied by her father, Prince Michael of Kent.
The Queen led the royal family at the wedding and was joined by the Duke of Sussex, who left his baby son Archie at home to attend, and the Duke of Edinburgh, making a rare public appearance.
Pippa Middleton, sister of the Duchess of Cambridge and friend of the groom, was among the guests at the ceremony
The beaming bride wore a Russian Fringe-style tiara also worn by her grandmother, Princess Marina, Duchess of Kent, and her mother, Princess Michael of Kent, for their wedding days.
Lady Gabriella’s hair was styled in elegant curls, with a long veil designed in a similar fashion to the dress.
Embroidered with flowers and embellishments, layers of blush-coloured tulle and organdie created the body of the wedding gown under the lace, fanning out for a long train.
Known as Ella, the bride had a creamy ivory Ella rose in her bouquet alongside myrtle, a tradition in many royal bridal flower arrangements.
The bridesmaids and pageboys wore outfits by the same designer.
Isabella and Maud Windsor – Lady Gabriella’s nieces – and the other bridesmaids wore cream dresses with blush underlays and sashes, with flower rings in their hair in a similar style to the bouquet.
Maud, the eldest daughter of Lord Frederick Windsor and Peep Show actress Sophie Winkleman, was part of the bridal party at Princess Eugenie and Jack Brooksbank’s wedding in October.
Pageboys wore cream shirts and knickerbockers for the midday ceremony conducted by Dean of Windsor the Right Rev David Conner.