Ghislaine Maxwell — the British socialite who’s long been accused of serving as Jeffrey Epstein’s madam — is under investigation by the FBI, sources confirmed to The Post on Friday.

Maxwell, who has largely kept out of the public eye since 2016, allegedly procured young women and groomed them to have sex with Epstein and his wealthy pals.

Several other “people who facilitated” the dead pedophile’s alleged sexual abuse are also being probed but Maxwell is the main focus, two sources familiar with the investigation told Reuters.

One of the sources said the probe is in its early stages and that the FBI is following up with leads it’s received from women who claim to have been victimized by Epstein.

The FBI currently has no plans to interview Prince Andrew, who’s been accused of having sex with one of Epstein’s most vocal accusers, Virginia Roberts Giuffre, Reuters reported. They did not rule out the possibility that he could be questioned at a later date.

The disgraced royal was forced to step down from public duties in November following his train-wreck interview in which he apologized for his “ill-judged” association with the multi-millionaire.

Andrew, 59, said he doesn’t remember meeting Giuffre and has denied her allegations.

Epstein, 66, committed suicide at a Manhattan jail in August, a month after he was arrested on federal sex-trafficking charges alleging that he abused girls as young as 14 for years.

Neither the FBI nor Maxwell’s lawyers returned messages.

Maxwell, the daughter of the late media titan Robert Maxwell, hasn’t been criminally charged but has been the subject of several civil lawsuits accusing her of being complicit in Epstein’s alleged sex trafficking ring.

In August, Attorney General William Barr vowed to go after anyone who helped Epstein commit crimes.

“Any co-conspirators should not rest easy,” Barr said.

With Post wires