Prince Harry allegedly “blew” his relationship with Queen Elizabeth II shortly before marrying Meghan Markle.

The monarch, who died in 2022 at age 96, felt “left out” of the Duke of Sussex’s wedding plans, according to royal biographer Sally Bedell Smith.

Smith told her Substack readers on Sunday that the former military pilot, 40, was “rude to [Elizabeth] for 10 minutes” in a February 2018 meeting about the nuptials, leaving the queen “very worried” about the “besotted and weak” groom.

“The Queen was dismayed that Harry had asked the Archbishop of Canterbury to perform the wedding service in St. George’s Chapel without first requesting permission from the Dean of Windsor,” Smith wrote.

Elizabeth was additionally aggrieved that Markle, 43, would not reveal her wedding dress details prior to walking down the aisle, Smith claimed.

She also wrote that Elizabeth was bothered by “Meghan and [Prince] William and Kate [Middleton] not working well together” leading up to the ceremony.

Smith reportedly received her intel via a phone call from Elizabeth’s late cousin, Lady Elizabeth Anson, ahead of her 2020 death.

“We hope but don’t quite think she is in love,” Anson told Smith in the February 2019 conversation. “We think she engineered it all.”

At the time, Anson claimed that Elizabeth said the “jury was still out” on whether she liked Markle.

As for her relationship with Harry, Elizabeth and her grandson reportedly “patched things up” in April 2018.

Harry’s rep has yet to respond to Page Six’s request for comment.

He and the “Suits” alum tied the knot in May 2018 — and reports continue to circulate about tensions leading up to the big day.

In May, biographer Katie Nicholl alleged in the “New Royals” that Markle “berated” her wedding caterer so badly over a dish that wasn’t vegan or macrobiotic that Elizabeth stepped in.

The queen reportedly said, “Meghan, in this family we don’t speak to people like that.”

Harry hit back at negative reports about his wife over the weekend, saying at the 2025 Nexus Global Summit that she was the “most trolled person in the world” in 2018.

The couple, notably, left England in 2020, moved to the United States and quit their royal roles.

They now live in a Montecito, Calif., mansion with son Archie, 6, and daughter Lilibet, 4.

While the little ones primarily stay out of the spotlight, Markle has shared more frequent photos of them since rejoining Instagram in January.