Inside Prince William and Prince Harry’s Interactions as They Mourn Queen Elizabeth II

Prince Harry and wife Meghan Markle were "very well protected" during a time of great loss – but the Duke of Sussex may still take the British government to court over his security arrangements in the U.K. Queen Elizabeth II, Britain’s longest-reigning monarch, died Sept. 8 at Balmoral Castle in Scotland.

Prince Harry and Prince William have come together several times in the wake of their grandmother, Queen Elizabeth II's, death to honor the late monarch in a series of public and private ceremonies. The state funeral procession for Her Majesty on Monday called upon the memory of another significant royal's death — the siblings' mother, the late Princess Diana. ET spoke with royal biographer Andrew Morton at Methodist Central Hall Westminster in England on Monday and discussed Harry and William's notorious rift, and how he feels their mother would react. «Well, the one thing that she would be really furious about is that they had this split,» Morton began, explaining that he had previously discussed the boys' relationship with Diana herself. «She always said to me, not just once, but on several occasions, that Harry is William's backup in the nicest possible way, he's his wingman, he's the one who helps William in this difficult job that he will have in the future because it's a lonely job.

Prince Edward was joined by wife Sophie, Countess of Wessex, to pay their respects to his late mother, Queen Elizabeth II, at her state funeral on Monday, September 19.

Princess Beatrice and Edoardo Mapelli Mozzi joined the royal family to pay their respects to Queen Elizabeth II at the late monarch’s state funeral on Monday, September 19.

A tough conversation. Princess Kate opened up about how her youngest son, Prince Louis, is coping with Queen Elizabeth II‘s death.

King Charles III and other members of the royal family marched behind Queen Elizabeth II‘s coffin as the Royal Navy transported her to Westminster Abbey ahead of her funeral.

More than one year after Prince Philip’s funeral, the late Duke of Edinburgh’s casket will be moved and reunited with his wife of seven decades, Queen Elizabeth II.

The youngest of the family. Queen Elizabeth II was a doting grandmother to eight grandchildren, a circle that was rounded out in 2003 and 2007 with Lady Louise Windsor and James, Viscount Severn, respectively.

Prince William was seen sweetly comforting wife Kate Middleton as they left a service at Westminster Hall following the Queen's coffin procession through central London on Wednesday afternoon. The coffin of the late Queen Elizabeth II, who died on 8 September, was moved from Buckingham Palace at the highly significant time of 2.22pm to Westminster Hall where it will lie-in-state for members of the public to pay their respects until Monday 19 September, the day of the late monarch's funeral.

and continue to show up alongside members of the royal family following the queen's death. On Tuesday, September 13, the Sussexes joined King Charles III, Camilla, Queen Consort, Prince William, and Prince Kate to receive Queen Elizabeth II's casket at Buckingham Palace.

Final bows. Meghan Markle greeted Queen Elizabeth II‘s coffin at Westminster Hall with a respectful curtsy.

Queen Elizabeth II‘s body has left Buckingham Palace for the last time. Mourners came out in droves on Wednesday to see the historic procession of the late British monarch as her coffin travelled from Buckingham Palace to Westminster Hall.

A somber family stroll. Prince William and Prince Harry both marched alongside the rest of the royal family as the late Queen Elizabeth II’s casket was transported to Westminster Hall amid funeral proceedings.

Queen Elizabeth II's body has left Buckingham Palace for the last time. Mourners came out in droves on Wednesday to see the historic procession of the late British monarch as her coffin traveled from Buckingham Palace to Westminster Hall. Somberly walking behind Her Majesty's casket was her son, King Charles III, and two grandsons, Prince William and Prince Harry. Other royals included in the procession were Elizabeth's other children, Princess Anne, Prince Andrew, and Prince Edward.

Meghan Markle and Prince Harry were among the royal family members waiting at Buckingham Palace to receive Queen Elizabeth II‘s coffin on Tuesday, September 13.

Prince William and Prince Harry will walk together behind Queen Elizabeth II’s coffin as it’s taken from Buckingham Palace to Westminister Abbey on Wednesday, Sept. 14.

Meghan Markle and Prince Harry were among the royal family members waiting at Buckingham Palace to receive Queen Elizabeth II‘s coffin on Tuesday, September 13.

, , Princess Anne, Prince Andrew, and Prince Edward, trailed behind their mother's coffin on Monday, September 12, as it was driven from Palace of Holyroodhouse to St. Giles’ Cathedral.

Such a sweetie. After Queen Elizabeth II died, Prince William and Princess Kate had to inform their three children of the news.