Former British Prime Minister Margaret Thatcher has died of a stroke, several news organizations are reporting.

The BBC said Thatcher, 87, suffered a stroke.

Thatcher was Britain's first and only female prime minister, serving from 1979 to 1990. As head of the Conservative Party and a staunch ally of President Ronald Reagan, she was called the "Iron Lady" for her political toughness.

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Thousands of "No Kings" protesters marched down Courtland Street from the Atlanta Civic Center to Liberty Plaza on Saturday. (Abbey Cutrer/AJC)

Credit: Abbey Cutrer