Princess Diana's Brother Was 'Sexually Abused As A Child'; Details 'Brutal Experience' In New Memoir

Princess Diana's younger brother Charles Spencer is opening up about the alleged sexual abuse he suffered when he was a student at an elite all-boys boarding school in England.

The 9th Earl Spencer, 59, detailed his alleged "brutal experience" at Maidwell Hall in a new memoir, "A Very Private School," which hits shelves Thursday.

Spencer alleged that he was groomed and sexually abused at age 11 by an assistant matron at the school, which he began attending in 1972 at 8 years old.

Spencer did not name the woman but said that she was 19 or 20 at the time and that she also allegedly targeted other boys under 13.

In a statement to Today and NBC News, Maidwell Hall said it is taking the allegations seriously and has notified local authorities who are investigating possible crimes against children.

"We will follow their guidance on what we do from this point," a spokesperson for the school said in the statement. "We would encourage anyone with similar experiences to come forward and contact the LADO or the police."

According to Spencer, he did not reveal his alleged abuse until he opened up about it to a therapist when he was 42.

"I was doing a 10-day course of very deep introspection and therapy," the British peer told Fox News Digital. "My therapist said to each of us, 'Whisper to me one secret you'd never told anyone.' I whispered to him that I was sexually abused as a child by an adult. And I remember him looking so shocked, and he had heard it all. Afterward, he took me aside and said, 'This is very serious stuff.'"

Spencer said it wasn't until then that he began allowing himself to feel the "full devastation" of his alleged experience.

The author also shared that he felt compelled to write the book and share his story after he met with other former students and learned about their traumatic experiences at Maidwell Hall.

One unnamed ex-schoolmate told Spencer that he "was made to feel worthless every day" and was allegedly repeatedly sexually assaulted when he was 9.

Detailing his alleged sexual abuse, Spencer told NBC News that the female school staffer allegedly French kissed him, touched his private parts and forced him to touch hers.

While he was spared from it, Spencer claimed that she allegedly had sexual intercourse with some of his schoolmates.

Spencer said he believes the alleged abuse resulted in him paying a sex worker and losing his virginity to her when he was 12.

He told Today that a private investigator he hired years ago to track down his alleged abuser found her and informed him she was alive. However, Spencer decided not to confront her, saying it would be "too much."

In the U.K., there is no statute of limitation for rape and sexual assault.

In addition to the alleged sexual abuse, Spencer told the outlet that he was allegedly beaten by two male teachers several times.

One teacher, who complained about wealth inequality, wore a signet ring that would cause scalp injuries during these alleged beatings, according to Spencer.

Spencer also accused the school's then-headmaster, identified by NBC News as the late John Alexander Hector Porch, of being a "sadistic pedophile" who employed teachers who were either "perverted or would never tell tales against him."

He told Fox News Digital that he believes his parents were not aware of the "cruelty and perversion" in the school, where Spencer claimed at least a dozen students were beaten every day for various reasons, including speaking after the lights had been turned off, accidentally spilling water and making jokes.

Spencer added that he was only allowed one letter home a week, but that he could not tell them what was going on because school staff monitored the contents of his messages.

"We were just left there at the mercy of some really dangerous people," Spencer alleged.

The 9th Earl Spencer told Fox News Digital that he continues to undergo treatment for post-traumatic stress disorder, but he's made a lot of progress in the past few months, especially after writing his memoir.