A conservative think tank is demanding President Trump release Prince Harry’s immigration file, on the heels of allegations that the Duke of Sussex may have lied about past illicit drug use when emigrating from the UK.

Harry’s immigration status has already sparked a legal battle and a pledge from Trump, 78, on the 2024 campaign trail that he’d take appropriate action in response to any false claims on official forms — after the exiled British royal family member confessed to taking cocaine, cannabis and psychedelic mushrooms in his 2023 memoir, “Spare.”

Applicants for visas or green cards are typically required to disclose their history of drug use — and can face potentially serious consequences like removal if they are misleading — but a federal judge ruled against any disclosure of the prince’s application papers last year.

Now, lawyers and fellows at the Heritage Foundation are hoping the 47th president will override the court’s decision to keep the records sealed — by opening them himself.

“I’ll be urging the president to release Prince Harry’s immigration records and the president does have that legal authority to do that,” said Nile Gardiner, who directs Heritage’s Margaret Thatcher Center for Freedom.