Princes Harry and William shared a "tight" relationship growing up. The youngest prince even became close to his brother's now-wife, Kate Middleton.
Since their mother's passing, the royal siblings remembered and paid tribute to the tragic event together. This year, however, they will "break" the tradition following the Duke of Sussex's relocation to the U.S.
The Daily Express reported that Prince Charles' sons have spent the anniversaries of their late mother's death together at Kensington Palace. They mark the day with tributes while spending quality time together.
While it is no longer possible royal expert Richard Fitzwilliams told Daily Express that Harry and William will likely continue to "reconnect" using virtual platforms. He claimed that they would "undoubtedly" communicate virtually to mark the day.
For the Duke of Cambridge, the expert said he might pay tribute to his late mother "publicly" using his official social media accounts. The Duke and Duchess of Sussex's no longer have any social media accounts.
Fitzwilliams said the public could expect to see "photographs" that entail "special memories" of the late Princess of Wales. Monday marks the 23rd anniversary of Princess Diana's death.
Reports recalled how the princes marked their mother's death in previous years. Sources said that the royal siblings spent time together last year and talked about their Thorpe Park trip with the Princess of Wales.
Alongside remembering their travels, they recalled all the "little things" about their mother that "made them laugh." These include their ski trips and all of her "efforts" for her sons.
On the 10th anniversary of her death the brothers held a "memorial service. A decade later they "commissioned" two documentaries about Diana and her achievements.
While Harry and William will not be able to reunite this year they released a "rare" joint statement earlier this week, according to Hello! magazine. Through Kensington Palace, the royal siblings informed the public that they had commissioned a statue of Diana.
The installation will commence July 1. Reports said the princess would have been 60.
The official statement adds that the statue is part of a tribute for the 20th anniversary of their mother's death - adding that it will allow the public to "recognize" her "positive effect not only in the UK but around the world.
