Convicted sex trafficker Ghislaine Maxwell once bragged that she performed a sex act on actor George Clooney during a party, Jeffery Epstein victim Virginia Giuffre claimed in her posthumous memoir.

Giuffre, who took her own life in April, reiterated claims that Epstein’s convicted accomplice allegedly loved to boast about her past romps — though she suggested this particular story could be overblown.

“Whether that was true or not, we’ll never know,” Giuffre wrote in the memoir, “Nobody’s Girl,” which was released last week.

Representatives for Clooney did not respond to The Post’s request for comment Sunday.

The claim — which involves Clooney and Maxwell getting intimate in a bathroom at a party — echoes one Giuffre has previously made about Maxwell, including in her unpublished memoir, “The Billionaire’s Playboy Club.”

Excerpts of the old memoir were released by a New York judge in 2020, which detailed Maxwell’s alleged proclivity to brag about hook ups she supposedly had with big name celebrities.

“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.

“But she had given George Clooney a blow job in the bathroom at some random event. … She never let that one down,” she added.

It remains unclear when and where such an event would’ve taken place, with Clooney among the members of Hollywood’s elite who have never been linked or seen publicly with Epstein, the 66-year-old disgraced financier and convicted pedophile who killed himself in jail awaiting sex-trafficking charges.

Prior to her suicide, Giuffre, 41, had been among the most vocal critics of Epstein and Maxwell since they trafficked her when she was a teenager.

Giuffre made headlines when she accused Britain’s Prince Andrew of being one of the men who abused her, with the son of the late Queen Elizabeth II forced to drop his royal titles earlier this month in the wake of fresh damaging revelations about his relationship with Epstein.

Andrew has always denied any allegations of wrongdoing, and even claimed that the infamous photo of him with his arm around a young Giuffre at Maxwell’s London home could be a fake.

However, he settled a lawsuit with Giuffre in February 2022 for an undisclosed amount. The royal did not admit wrongdoing.

Maxwell, 63, is currently serving 20 years in prison following her conviction over sex trafficking charges linked to Epstein’s pedophile ring.