Princess Eugenie 'removed from Royal Family blacklist' after cutting ties with Prince Harry

However, it seems that the daughters of Prince Andrew may be distancing themselves from the couple as they were spotted at the Buckingham Palace garden party supporting Prince William, despite the ongoing family feud.

After the event, Eugenie issued a statement highlighting the importance of "supporting family" and beamed in the pictures alongside her sister.

Speaking to Woman's Day, a royal insider said: "Bea and Eugenie can't imagine what William is going through right now, and it was an honour for them to give him some support.

"The York sisters were determined not to let him down."

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The sisters have been mooted for a royal promotion since both King Charles and Princess Kate were diagnosed with cancer.

The King has scaled back his duties and the princess is yet to return to public engagements as she recovers in private.

The royal insider told the outlet that the Princesses of York are "overjoyed" to be taking a more active role in the family, especially since Eugenie was on an "blacklist" after hosting Harry and Meghan at her Portugal home last year.

The source added: "But that was last year and she's worked hard to prove her commitment to the royals.

"She didn't reach out to Harry when she was in LA in February. This confirmed his worst fears that his last line to his family was over."

Beatrice and Eugenie also chose not to attend Prince Harry's Invictus Games event last month.

The Duke of Sussex travelled to London on May 7 to give a reading at St Paul's Cathedral to mark the 10th anniversary of the games and seemingly saw no members of the Royal Family whilst he was in the UK.

King Charles and his youngest son last met in February, days after it was announced that the monarch had been diagnosed with cancer.

Speaking to Good Morning America in February, Harry said: "I jumped on a plane and went to go see him as soon as I could.

"Look, I love my family. The fact that I was able to get on a plane and go and see him and spend any time with him, I’m grateful for that."

He added: "I've got other trips planned that will take me through the UK, or back to the UK and so I’ll stop in and see my family as much as I can."