The pair looked sombre as they attended the service in all-black ensembles, both wearing elegant wide-rimmed hats. The Princess of Wales looked sophisticated in a bespoke Alexander McQueen black coatdress, which she teamed with a pearl necklace that belonged to the Queen. She completed her look with the 'Halo Pillbox' hat by Jane Taylor London, featuring a subtle black veil, with her glossy hair in a sleek up-do.
Duchess Meghan and Princess Kate alongside the Queen Consort, Prince George and Princess Charlotte
The Duchess of Sussex opted for a black cape midi dress from Stella McCartney, with wide batwing sleeves and a boater neckline. As for her accessories, Meghan wore the diamond and pearl earrings given to her by the late monarch.
Walking alongside each other in the chapel, the similarities between Kate and Meghan's hats were clear in style, though Duchess Kate's hat came in a sleek velvet material, with a delicate ribbon tied around the base. Meghan's hat from Stephen Jones Millenery for Dior hat came in a floppy design, tilting slightly on her head.
Kate's subtle veil was worn as part of royal funeral traditional dress codes, and are typically made from lace, tulle or netting.
WATCH: Queen Elizabeth life in pictures
The Queen's funeral took place in Westminster Abbey on Monday 19 September. Members of the royal family filed in together, with the Princess of Wales walking Prince George and Princess Charlotte, as the Prince of Wales walked on the other side of the children - while Meghan walked alongside her husband Prince Harry.
Make sure you never miss a ROYAL story! Sign up to our newsletter to get all of our celebrity and royal news delivered directly to your inbox.