In March 2023, King Charles granted his youngest brother Prince Edward, the title of Duke of Edinburgh for his 59th birthday. Up to that point, Edward was the Earl of Wessex. The title of Duke of Edinburgh is an especially significant gesture as it was the one held by their father, Prince Phillip, for more than 70 years.

After Phillip's passing, many assumed the title would go to his youngest son, and a source told The Daily Mail that The Queen had promised the position to Edward before her passing. But the title didn't pass on to Edward that seamlessly. According to reports, King Charles, who was responsible for naming the next Duke of Edinburgh, considered saving the coveted position to give to his granddaughter, Princess Charlotte, when she was older.

The idea of getting passed over for Princess Charlotte was very hurtful to Edward, who is quite close to his brother Charles. A source close to Edward said, "'It was a slap in the face, particularly when Edward has been such a help to Charles over the Andrew farrago." However, after some time to reflect, and perhaps after realizing how hurtful choosing Charlotte would be to Edward, Charles did elect to make his younger brother the Duke of Edinburgh. However, some sources have speculated that Charles may request to have the title returned to the Crown after Edward's death rather than passing it to Edward's son, but that remains to be seen.