It is understood that the Duke and Duchess of Sussex met with the Prince of Wales for some "clear the air" talks at Windsor Castle.
The British monarch turns 96 years old on April 21.
The Duke of Sussex admitted in 2019 that he and his brother are now on different paths but he will always love him.
The Duke of Sussex said he wants to make sure that Her Majesty "is protected and has got the right people around her."
The Duke and Duchess of Sussex were unable to meet with Prince William in the U.K. ahead of their trip to the Netherlands last week.
The Duke of Sussex once described the Duchess of Cambridge as "the sister he never had."
The Duke of Sussex said it "was great" and "just so nice to see" his grandmother again.
A spokesperson for the Duke and Duchess of Sussex said that no decision has been made yet to whether they will join the royals for the celebrations.
The Duke of Sussex paid Prince Charles, Camilla, and Queen Elizabeth Ii a visit last week Thursday at Windsor Castle.
The Duke and Duchess of Sussex shared a brief kiss on stage during the opening ceremony for the competition in The Hague.
The Duke of Sussex said that it "was great to see" his grandmother ahead of the Invictus Games.
The Duke of Edinburgh died on April 17 at Windsor Castle because of old age.
Over 2 pounds of hand-rolled Japanese green tea leaves sold for a record-breaking 1.96 million yen (£11,881) at the season's inaugural auction on Monday.
The British royals are expected to reunite for the Platinum Jubilee celebrations on June 2-5, 2022.
The Duchess of Sussex gushed about her husband during her speech at the opening ceremony of the Invictus Games.
Expectations are high for the Duke and Duchess of Sussex to join the Platinum Jubilee celebrations in June with their children.
The Duke and Duchess of Sussex dropped by Windsor ahead of their trip to the Netherlands for the Invictus Games.
The Duke and Duchess of Cambridge met with the Queen, Camilla, and Prince Charles ahead of their trip to The Hague.
A royal biographer accused the Duke and Duchess of Sussex of using Her Majesty to boost their popularity.
The Duke and Duchess of Sussex paid Her Majesty a visit ahead of their trip to the Netherlands for the Invictus Games.
The visit to Her Majesty marked the first time the Duchess of Sussex returned to the U.K. since Megxit in 2020.
The Duke and Duchess of Sussex welcomed their daughter Lilibet Diana on June 4, 2020.
The Duke of Sussex had announced that he is unable to go home to the U.K. because of the lack of police protection.
The Duke of York recently settled a sexual abuse case out of court with his accuser Virginia Roberts Giuffre.
The Duke and Duchess of Sussex will be in The Hague for the Invictus Games from April 16 to 22.
The Duchess of Sussex will accompany Prince Harry to the Invictus Games in the Netherlands over the weekend.
The Duchess of Cornwall had initially struggled to keep up pace with the Prince of Wales' tight schedule when she became his wife.
The Duke and Duchess of Sussex accused a senior royal of being racist during their interview with Oprah Winfrey in 2020.
It is said that the Duke of Sussex will use his upcoming memoir to publicly humiliate the Duchess of Cornwall.
The Duke of York escorted Her Majesty to Prince Philip's memorial at Westminster Abbey on March 29.