UK Prime Minister Boris Johnson is fighting for the return of an American diplomat’s wife who is claiming diplomatic immunity over the death of a British teen — and will appeal directly to President Trump if she refuses, he said Monday.

Johnson urged Anne Sacoolas, 42, to return to the UK after she fled to avoid charges in the hit-and-run car crash that killed 19-year-old Harry Dunn on Aug. 27.

Britain’s leader said his cabinet was meeting with the US ambassador in London — and he would raise the issue with Trump personally if Sacoolas continues to remain in America.

“I do not think that it can be right to use the process of diplomatic immunity for this type of purpose,” Johnson told the BBC.

“I hope that Anne Sacoolas will come back and will engage properly with the processes of law as they are carried out in this country. That’s a point that we’ve raised — or are raising today — with the American ambassador here in the UK, and I hope it will be resolved very shortly.”

Dunn, 19, died when his motorcycle collided with a car near RAF Croughton in Northamptonshire on Aug. 27.

Mother-of-three Sacoolas — whose husband Jonathan Sacoolas was based there — initially “engaged fully” with police and said “she had no plans to leave the country in the near future,” a police spokeswoman told The Guardian.

Northamptonshire Police’s chief constable, Nick Adderley, said they had appealed in “the strongest terms” to apply a waiver to her immunity and “allow the justice process to take place”.

He told Sky News that Sacoolas has a “moral obligation” to return and face justice.