Prince Harry's surprise appearance in a London court this week has led one royal biographer to claim that he is attempting to overshadow his father, King Charles III, during his first state trip abroad as a monarch.

The Duke of Sussex attended a preliminary hearing in his privacy lawsuit against Associated Newspapers Limited (ANL), publisher of Daily Mail and Mail on Sunday. The hearing will determine if the case, involving allegations of unlawful information-gathering practices, will proceed. ANL has denied the accusations and seeks to have the case dismissed.

Angela Levin, author of "Harry: A Biography of a Prince" and "Camilla: From Outcast to Queen Consort," spoke with GB News host Dan Wootton about Prince Harry's decision to attend the hearing. She suggested that his presence was intended to "beat" his father, who was in Germany for the first state visit of his reign.

Levin said, "I think the first thing is that he wants to beat his father," adding, "he knew he would make the front page. He's stealing the headline but also say[ing], 'I'm the one on the front page. I should be ruling.' He's got a very weird feeling now that he should be running the royal family."

These claims by Levin cannot be independently verified by International Business Times. King Charles III's trip to France was canceled due to civil unrest in the country.

Levin also proposed two other potential reasons for Prince Harry's return to the UK at this time. One was a "test run" to determine if he would be allowed back into the US due to past drug use. The other was to assess his influence in the UK and demonstrate his strength.

When asked if she thinks Prince Harry believes he should be king, Levin replied, "I think he does, yes," adding, "I think he wants to crash this monarchy and take over with Meghan [Markle]."