Harry, 34, arrived with Sophie Windsor (Lady Gabriella’s sister-in-law) at St George’s Chapel, close to his home Frogmore Cottage in Windsor.
Meghan, 37, gave birth to their son Archie Harrison Mountbatten-Windsor on May 6, 2019. On Friday, his birth certificate was released and it was confirmed that he was born at the private Portland hospital in London.
On May 19, the couple celebrate their first wedding anniversary.
The Queen, 93, donned a raspberry pink coat, with a matching hat and floral dress for the ceremony.
Other members of the Royal Family joined her - including the Duke of Edinburgh Princess Anne, Prince Edward, Prince Andrew and ex wife Sarah Ferguson and their daughter Princess Beatrice with her boyfriend Edoardo Mapelli Mozzi.
While the Duke and Duchess of Cambridge did not attend, Kate’s sister Pippa Middleton and her husband James Matthews were among the guests.
She is a friend of Mr Kingston and he and Lady Gabriella attended their wedding in May 2017.
Pippa, 35, wore a £695 powder blue floral dress by Kate Spade with a headband.
Her parents Carole and Michael and brother James also arrived with them.
Lady Gabriella Marina Alexandra Ophelia Windsor, also known as Ella, is the daughter of Prince and Princess Michael of Kent.
Her father is the Queen’s cousin and her mother is an author.
Lady Gabriella’s wedding dress is a bespoke design by Luisa Beccaria, made of lace, embroidered with flowers and embellishments.
Her veil was made from layers of white tulle, together with embroidered flowers and she wore a wore a Russian Fringe style diamond tiara, also worn by her grandmother Princess Marina, Duchess of Kent, and her mother, HRH Princess Michael of Kent, on their wedding days.
The bridesmaids and page boys also wore outfits by Italian designer Beccaria.
The bridal party included Isabella Windsor, Maud Windsor, Leonora Weisman, Aurelia del Drago, Eliza Goldsmith, Emily Conolly, Frederick Murray, Rafferty Murray and Karim Khawaja.
Mr Kingston’s Best Men were Mr Benjamin Crow, Mr Daniel Crow and Mr Jamie Campbell.