Maxwell — Jeffrey Epstein’s former girlfriend who now faces sex-trafficking charges — boasted about the sexual conquest to one of their alleged victims, Virginia Giuffre, as the women traveled together in the 2000s, according to the UK Sun, which cited court documents.

“One [time] she came back giddy as a schoolgirl with an explosion of news, with all the build up and excitement in her voice you’d think she was the next crown princess,” Giuffre wrote of Maxwell in her book, which was unsealed by a New York judge last week.

“But she had given George Clooney a b–w j-b in the bathroom at some random event. … She never let that one down.”

In her 139-page manuscript, “The Billionaire’s Playboy Club,” Giuffre writes that Maxwell “loved to brag about her rendezvous with various lovers.”

It wasn’t clear where or when the reported sexual encounter happened, but Maxwell boasted about performing the sex act on the star in a restroom as the pair took a trip in 2001, the paper reported last year.

There’s no mention of Clooney being involved with underage sex, Epstein’s crimes, or other wrongdoing of any kind, according to the outlet.

Giuffre’s book was originally submitted to the court during a defamation case brought by Roberts against Maxwell in 2015, which was settled two years later.

George Clooney in 2000

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Virginia Roberts and Ghislaine Maxwell (right)

More than 2000 pages of evidence were released, but nearly half of the court filings remained under seal or redacted, including details about Maxwell’s alleged encounter with Clooney.

Maxwell is awaiting trial on charges of enticement of minors, sex trafficking of children, and perjury for allegedly recruiting underage women for the disgraced financier.

Giuffre has claimed she was forced to become a “sex slave” as a teen for Epstein and his well-heeled friends.

Maxwell’s trial is scheduled to begin in July 2021. She faces 35 years in prison if convicted.