Kate MiddletonandMeghan Markleare in London to honorQueen Elizabeth.

The newPrincess of Wales, 40, and the Duchess of Sussex, 41, made their way from Buckingham Palace to Westminster Hall on Wednesday, where a service was held in honor of the late monarch.

Kate rode withQueen Camilla, King Charles' wife — withQueen Elizabeth’s death, they are now the two highest ranking women in the royal family as Queen Consort and Princess of Wales.

Meanwhile, Meghan was in a separate car withSophie, Countess of Wessex, Prince Edward’s wife.

Kate’s husband,Prince William, and Meghan’s husband,Prince Harry, walked behind their grandmother’s casket in a procession through London.

Meghan Markle.DANIEL LEAL/AFP via Getty Images

Meghan, Duchess of Sussex is driven behind the coffin of Queen Elizabeth II, adorned with a Royal Standard and the Imperial State Crown and pulled by a Gun Carriage of The King’s Troop Royal Horse Artillery

They joined the Queen’s four children —King Charles III,Princess Anne,Prince AndrewandPrince Edward— as well as their cousin Peter Phillips, Princess Anne’s husband Sir Tim Laurence, the Queen’s cousin Prince Richard the Duke of Gloucester and the Queen’s nephew David Armstrong-Jones the Earl of Snowdon in the procession through the streets of London. Members of the Queen’s staff also participated in the procession.

Kate Middleton, Princess of Wales.MARCO BERTORELLO/AFP via Getty Images

Catherine, Princess of Wales is driven behind the coffin of Queen Elizabeth II, adorned with a Royal Standard and the Imperial State Crown and pulled by a Gun Carriage of The King’s Troop Royal Horse Artillery

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King Charles and Queen Camilla led the family in the procession into Westminster Hall. Kate andPrince Williamstood ahead ofPrince Harryand Meghan as they stood for the entirety of the ceremony.

Queen Camilla and Kate Middleton, Princess of Wales.Daniel Leal/AP/Shutterstock

Camilla, Queen Consort, left and Britain’s Kate, Princess of Wales are driven, behind the coffin of Queen Elizabeth II, during a procession for the Lying-in State of Queen Elizabeth II, from Buckingham Palace

The Queen will then lie in state in Westminster Hall for five days, where hundreds of thousands of people are expected to flow through and pay their respects leading up to the funeral on Monday, September 19.

Queen Elizabeth’s coffin.MARCO BERTORELLO/AFP via Getty Images

The coffin of Queen Elizabeth II, adorned with a Royal Standard and the Imperial State Crown and pulled by a Gun Carriage of The King’s Troop Royal Horse Artillery

Kate,Prince William, Meghan andPrince Harrystepped out together on Saturdayto view tributes toQueen Elizabethleft outside Windsor Castle and greet well-wishers.

Prince Williaminvited the Duke and Duchess of Sussex to join him and Kate, according to Kensington Palace. The new Prince of Wales thought the walkabout to greet the crowds “was an important show of unity at an incredibly difficult time for the family,” a royal source told PEOPLE.

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Queen Camilla, Kate Middleton, Sophie and Meghan Markle.Tim Rooke/Shutterstock

Camilla Queen Consort, Catherine Princess of Wales, Sophie Countess of Wessex and Meghan Duchess of Sussex Queen Elizabeth II’s coffin procession from Buckingham Palace to Westminster Hall

A palace insider told PEOPLE: “It’s such an extraordinary historical moment and also a deeply personal one for the family that you’d hope and think that all members of the family would unite and support [the King] especially. And perhaps some of those wounds can be healed in the process.”

source: people.com