British Foreign Secretary Boris Johnson surrendered his citizenship in 2016, data released by the IRS shows.
The Internal Revenue Service data published Wednesday shows that 5,411 people said goodbye to being American last year.
The number of Americans surrendering their citizenship or long-term US residency is at an all-time high, according to the IRS.
“The escalation of offshore penalties over the last 20 years is likely contributing to the increased incidence of expatriation,” tax attorneys Andrew Mitchel and Ryan E. Dunn wrote in the International Tax Blog.
Johnson, who was born in Upper East Side of New York in 1964, apparently took the measure over taxes.
He had complained to the IRS in 2014 over an “outrageous” tax bill he had to pay for sale of a home he owned in the British capital London.
The US taxes its citizens living abroad based on their worldwide income.
Johnson, who graduated from Eton and Oxford and has Turkish and Russian ancestors, last lived in the US when he was five.
Born Alexander Boris de Pfeffel Johnson, the foreign secretary’s name appeared as Alexander Boris Johnson in the IRS list.