So it is fitting that her granddaughters-in-law, Kate, the Princess of Wales, and Meghan, the Duchess of Sussex, chose fashion choices to honor the late monarch.

Kate, the wife of Prince William, and Meghan, the wife of Prince Harry, took part Wednesday in the royal family's procession escorting the queen's coffin from Buckingham Palace to Westminster Hall, where it will lie in state until her Sept. 19 funeral.

PHOTO: Prince William, Kate, Princess of Wales, Prince Harry and Meghan, Duchess of Sussex walk as the procession with the coffin of Britain's Queen Elizabeth arrives at Westminster Hall in London, Sept. 14, 2022.
Phil Noble/Pool Photo via AP
Prince William, Kate, Princess of Wales, Prince Harry and Meghan, Duchess of Sussex walk as the procession with the coffin of Britain's Queen Elizabeth arrives at Westminster Hall in London, Sept. 14, 2022.

The sisters-in-law both wore black to the somber event and paired their ensembles with sentimental nods to the queen.

Kate wore on her left lapel a brooch that belonged to the queen. Known as the Diamond and Pearl Leaf Brooch, it features three pearls set on a diamond leaf. Both Kate and the late queen have been photographed wearing the brooch previously.

Meghan paid tribute to the queen with her earrings, a pearl and diamond pair that were gifted to her by the queen.

PHOTO: Britain's Catherine, Princess of Wales is driven behind the coffin of Queen Elizabeth II, during a procession from Buckingham Palace to the Palace of Westminster, in London, Sept. 14, 2022.
Marco Bertorello/AFP via Getty Images
Britain's Catherine, Princess of Wales is driven behind the coffin of Queen Elizabeth II, during a procession from Buckingham Palace to the Palace of Westminster, in London, Sept. 14, 2022.
PHOTO: Meghan, Duchess of Sussex leaves the Westminster Hall, at the Palace of Westminster, where the coffin of Queen Elizabeth II, will Lie in State on a Catafalque, in London, Sept. 14, 2022.
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Meghan, Duchess of Sussex leaves the Westminster Hall, at the Palace of Westminster, where the coffin of Queen Elizabeth II, will Lie in State on a Catafalque, in London, Sept. 14, 2022.

The queen gave Meghan the earrings in June 2018, shortly after her wedding to Harry, on the occasion of Meghan's first solo engagement with her. Meghan and the queen traveled from London to Cheshire in the royal train for a day of engagements, throughout which they were seen sharing laughs.

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MORE: Princes William, Harry walk together in procession escorting Queen Elizabeth II's coffin

Both Meghan and Kate have appeared to enjoy a warm relationship with Elizabeth over the years.

Harry and Meghan named their daughter Lilibet "Lili" Diana Mountbatten-Windsor after the queen, whose family nickname was Lilibet. Her middle name, Diana, is a tribute to Harry's mother, the late Princess Diana.

PHOTO: Meghan, Duchess of Sussex and Queen Elizabeth II laugh during a ceremony to open the new Mersey Gateway Bridge, June 14, 2018, in the town of Widnes in Halton, Cheshire, England.
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Meghan, Duchess of Sussex and Queen Elizabeth II laugh during a ceremony to open the new Mersey Gateway Bridge, June 14, 2018, in the town of Widnes in Halton, Cheshire, England.

Meghan told Oprah Winfrey in a 2021 interview that the queen was one of the first family members she met in her relationship with Harry.

"I just really loved being in her company," said Meghan, adding the queen "has always been wonderful to me."

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Kate was by the queen's side at many engagements and stood in for the queen at times in recent years as she reduced her workload.

During one memorable engagement together in 2019, the queen and Kate shared a blanket while traveling by car.

PHOTO: Queen Elizabeth II and Catherine, Duchess of Cambridge depart King's College London, March 19, 2019, in London.
Neil Mockford/GC Images/Getty Images
Queen Elizabeth II and Catherine, Duchess of Cambridge depart King's College London, March 19, 2019, in London.

In a statement after the queen's death, William reflected on what she meant to their family, including their children, Princes George and Louis and Princess Charlotte.

"And while I will grieve her loss, I also feel incredibly grateful. I have had the benefit of The Queen's wisdom and reassurance into my fifth decade," William said. "My wife has had twenty years of her guidance and support. My three children have got to spend holidays with her and create memories that will last their whole lives."