Prince William 'struggled' with Prince Harry's exit, author claims: 'A lot of anger and hurt on both sides'

Katie Nicholl, author of "The New Royals," explains why Prince Harry and Prince William's relationship is allegedly still strained amid Queen Elizabeth II's passing in September.

Nicholl told Fox News Digital that after the Duke and Duchess of Sussex said "I do" in 2018, Harry was hoping that the Prince and Princess of Wales would show his new bride the ropes in successfully navigating royal life. However, the former American actress was allegedly left on her own. Stephanie Nolasco covers entertainment at Foxnews.com.

"It was certainly Harry’s feeling that William and Kate hadn’t rolled out the red carpet as much as they might have done," Nicholl said. "You know, there wasn’t this sort of instant welcoming of Meghan into the royal fold. I say in the book that William was the first to meet Meghan. And actually, he was really thrilled that Harry had met someone who he’d really fallen for. Because remember, at this time, Harry was very much on the shelf, a single man. Many of his friends were, by this point, married and having children. And Harry was genuinely worried he was going to be a bachelor forever. And so, he was overjoyed when Meghan came into his life, and he fell in love with this woman."