Despite confirming his attendance, Bullen believes that Harry is anxious about how the rest of the family will react to him. It's likely that he will try to minimize the amount of time he spends in London.
Buckingham Palace announced earlier this month that the Duke of Sussex will be traveling to London for the ceremony, while his wife Meghan Markle and their children Prince Archie and Princess Lilibet will be staying back in California.
Archie's fourth birthday also happens to fall on the same day as the coronation, and Harry has already expressed a desire to be back in time for the celebrations.
However, according to Bullen, Harry's visit will be brief and he won't be taking part in the procession or balcony appearance. These are typically reserved for working royals only.
Tensions have been high between Harry and the rest of the royal family since he and Meghan stepped down from their senior roles in January 2020.
The couple spoke out about their experiences in The Firm in their December 2022 Netflix docuseries, Harry & Meghan. Harry also released a tell-all memoir called "Spare" in January, which included many allegations against his father and brother, Prince William.