Karwai Tang/WireImage Meghan Markle and Prince Harry
Meghan Markle and Prince Harry will not join other royals at a Buckingham Palace reception for world leaders traveling to London for Queen Elizabeth’s funeral.
PEOPLE understands that while the Duke and Duchess of Sussex were originally invited to the event on Sunday, the palace now says the reception is “for working members of the royal family.”
Hosted by King Charles and Queen Camilla, the reception will welcome foreign heads of state and official guests who have traveled to London for Queen Elizabeth’s state funeral on Monday. Around 2,000 people are expected to gather at Westminster Abbey for the event.
RELATED: Meghan Markle Wears Earrings Gifted to Her by Queen Elizabeth at London Service
BEN STANSALL/POOL/AFP via Getty Images Prince Harry and Meghan Markle
On Saturday night, Prince Harry will join his seven cousins in a vigil around Queen Elizabeth’s coffin at Westminster Hall, where it lies in state and has been visited by thousands of mourners since Wednesday.
Related video: Prince Harry and Meghan had private dinner with Prince William and Kate
Although it was announced earlier this week that only working royals holding military rank would wear their service uniforms for the Queen’s funeral services, Prince Harry — who served two tours in Afghanistan during his 10-year career in British Army — will wear their military regalia for the vigil.
The update comes “at the request of the King,” according to a palace source, and the decision was made without Prince Harry requesting a change, PEOPLE has learned. The Duke of Sussex was ready to wear whatever was asked of him, PEOPLE understands, and focused on honoring his grandmother.
Darren Fletcher – WPA Pool/Getty Prince Harry and Meghan Markle
Prince Harry, who turned 38 on Thursday, and Meghan, 41, had traveled to Europe from their California home for a series of charity events when Queen Elizabeth died on September 8.
I can not get enough PEOPLERoyals coverage? Sign up for the free Royals newsletter to get the latest updates Kate Middleton, Meghan Markle and more!
On September 10, Meghan and Harry joined Prince William and Kate Middleton at Windsor Castle to view tributes to the late queen and greet well-wishers. Prince William, who invited his brother and sister-in-law to join him and Kate, thought the outing “was an important show of unity at an incredibly difficult time for the family,” a royal source tells PEOPLE.
Chris Jackson – WPA Pool/Getty Kate Middleton, Prince William, Prince Harry and Meghan Markle
The couple were at Buckingham Palace on Tuesday when Queen Elizabeth’s coffin arrived from Scotland and joined members of the royal family on Wednesday for a service at Westminster Hall after Prince Harry joined his father, brother and other family members of in a procession in London.