Britain's Prince Harry poses with Meghan Markle in the Sunken Garden of Kensington Palace, London, Britain, November 27, 2017. [Photo/Agencies]

Markle said she met Harry through friends in London in July 2016, and that they had been dating quietly for several months before the romance hit the headlines.

The media attention then became so intense that Harry took the unusual step of officially confirming the romance in order to warn the media off. In a strongly-worded statement issued through the palace, the prince pleaded for reporters to stop intruding on his girlfriend's privacy. He condemned "outright sexism and racism" in some online comments, and said some articles with "racial undertones" had crossed the line.

Some tabloids had alluded to Markle's mixed-race heritage, pointing out she has an African-American mother and a white father.

Markle herself has spoken out about coming to terms with being biracial — both growing up, and in her Hollywood career.

In a March interview with Allure magazine, she said studying race at college was "the first time I could put a name to feeling too light in the black community and too mixed in the white community.

"For castings, I was labeled 'ethnically ambiguous'," she said.

Markle was born Aug 4, 1981, to a clinical therapist mother and television lighting director father. She grew up in Los Angeles, and now lives in Toronto.

She studied at a girls' Roman Catholic high school before attending Northwestern University in Illinois, where she studied theater and international relations.

Markle married film producer Trevor Engelson in 2011, but the pair divorced two years later.

It wouldn't be first time that a British royal has married an American — or a divorcee. In 1936, Edward VIII famously abdicated after he was forced to choose between the monarchy and his relationship with twice-divorced American socialite Wallis Simpson.

In her Vanity Fair interview, Markle made clear the world's attention on her romance did not faze her.

"I'm still the same person that I am, and I've never defined myself by my relationship," she said. "The people who are close to me anchor me in knowing who I am. The rest is noise."

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