A New York-born playwright is at the center of a British political scandal that could decide the country’s next prime minister.

Eve Leigh — the lefty 34-year-old daughter of famed Broadway composer Mitch Leigh — and her husband admitted Saturday that they called the cops Friday about the plate-smashing row between front-runner Boris Johnson and his live-in gal pal, Carrie Symonds, and then tipped off the press.

News of the spat — during which Symonds, 31, allegedly asked Johnson to “get off me” and “get out of my flat” — has dominated UK politics in the days since, with Johnson, 55, fending off questions about his fitness to lead the country.

Leigh’s husband, Tom Penn, 29, claimed in the statement released late Saturday that they called the police and recorded audio of the fight for “the welfare and safety of our neighbours” and then notified the left-leaning Guardian newspaper because they felt “it was of important public interest.”

But the couple have been facing questions about their motives after it emerged that Eve has expressed opposition to “Brexit” — the movement Johnson first helped push — on Twitter, where she also declared that “all Tories suck” and bragged about taking it out on Johnson himself.

“Just gave Boris Johnson the finger, this weekend is unstoppable,” she once bragged on her now-deleted Twitter account, according to The Telegraph.

She has also defended Labour Party leader Jeremy Corbyn, and earlier this year, one of her plays was featured in Brexit Stage Left, a pro-European Union festival with European funding, according to The Telegraph.

The couple has been hiding out — while Symonds moans to friends about the “dirty tricks story” by her “eavesdropping” neighbors, according to the Times of London.

Eve — born Rebecca Leigh — grew up in New York with composer dad Mitch, who won a Tony Award for “Man of La Mancha” before his death in 2014.

A graduate of the University of Cambridge, she described herself in an interview with The Stage newspaper earlier this year as a Buddhist who used to work as a palm reader, and said her partner is a close-up magician.

Her mother, artist Abby Leigh — whose works have been shown at the Met, Guggenheim and Whitney — still lives in the Big Apple, but declined to comment Sunday on her daughter’s role in the scandal.

Eve’s husband, however, came forward to defend himself and his wife against the “frankly bizarre and fictitious” things being said about them.

“I would ask that you leave private citizens alone and focus instead on those who have chosen to run for power within the public eye,” Penn complained of the media circus outside their London home.

He insisted in his statement to the Guardian that they only got involved after failing to get responses when knocking repeatedly on Johnson’s door.

“My sole concern up until this point was the welfare and safety of our neighbors. I hope that anybody would have done the same thing,” he said.

“I believe it is reasonable for someone who is likely to become our next prime minister to be held accountable for all of their words, actions and behaviors.”

“I, along with a lot of my neighbors all across London, voted to remain within the EU,” he continued of his hostility to Brexit. “That is the extent of my involvement in politics.”

Johnson is up against Jeremy Hunt to replace Theresa May as prime minister at the end of July, with the pair due to go head to head in events around the country before their Conservative Party’s 160,000 members get the final vote.

Polls show that Johnson — who was himself born in Manhattan, but later renounced his US citizenship — is the favorite to win.