She has her own island — but no high school diploma.

Liquor heiress-turned-Nxivm sex cult financier Clare Bronfman successfully asked a judge on Thursday to ease up on her house arrest restrictions while she awaits sentencing for her role in the group — so she can graduate from high school.

The 40-year-old scion to the Seagram’s booze fortune, who faces 25 years behind bars, only has a 10th-grade education and has spent 160 hours preparing for the national high school equivalency exam while under house arrest, her lawyers argued Thursday in a letter to the Brooklyn federal judge in charge of the salacious case.

But she’ll need to leave her Manhattan apartment to take the actual test, her lawyers told Judge Nicholas Garaufis.

Hours later, the judge ruled — giving Bronfman leave to take the test, but nixing her request for an additional 90 minutes per day she’d hope to be outdoors “for running, exercising, and grocery shopping.”

Bronfman, who part-owns an island in Fiji, has been on home detention — wearing an ankle bracelet and secured by a $100 million bond — since her July 24, 2018, arrest, and is currently allowed five hours a week out of her pad for exercise and shopping.

Studying for the exam “has inspired Ms. Bronfman to continue her education past the high school level,” the lawyers write.

And while she understands it’s not “practical” to enroll in college, she now hopes to take “basic adult education classes in areas such as anatomy, physiology, English literature, and writing, for as long as she is able to under the circumstances,” the lawyers write.

Bronfman, daughter of the late Canadian billionaire Edgar Bronfman Sr., pursued a career as an elite equestrian show jumper in her youth before falling into the notorious upstate organization run by self-styled guru Keith Raniere and using her family fortune to help fund the group.

Raniere was found guilty of a slew of charges in June for running a secretive sex slave group within Nxivm in which women were branded like cattle and forced to have sex with him.

Bronfman, a high-ranking Nxivm board member, pleaded guilty earlier this year to charges of conspiracy to conceal and harbor an illegal alien for financial gain, and fraudulent use of identification. Her sentencing has yet to be scheduled.