LONDON — Prince Harry, fifth in line to the British throne, will marry American actress Meghan Markle in the spring, royal officials announced Monday, confirming months of speculation.
Markle, a humanitarian campaigner and lifestyle blogger who succeeded in show business before falling for Harry, will become a senior member of the royal family as the wife of one of the monarchy's most popular figures.
The couple posed for photographers on the grounds of Kensington Palace hours after their engagement was announced by Harry's father, Prince Charles.
Harry, wearing a blue suit and tie, said he was "over the moon." Asked when he knew Markle was "the one," he said: "Very first time we met."
Markle said she was "so very happy." She wore a belted white coat and held Harry's hand as photographers focused on her engagement ring.
Palace officials said Harry designed the ring himself. It features two diamonds that belonged to his late mother Princess Diana, and a central diamond from Botswana, a country he and Markle have visited together.
They left with their arms around each other. The couple plan to give their first joint interview later Monday.
Harry, a bad-boy-made-good by his tireless devotion to wounded veterans and his embrace of a variety of charitable causes, has said for several years that he wants to start a family, and the rumors of his engagement to Markle have been flying for months.
The marriage represents a first-ever blending of Hollywood glamor with the once-stuffy royal family, which has of late seemed less fixed in its ways, and brings a mixed-race American divorcee into a highly visible role.
Harry's brother, Prince William, and his pregnant wife Kate welcomed Markle to the royal family.
"We are very excited for Harry and Meghan," they said in a statement. "It has been wonderful getting to know Meghan and to see how happy she and Harry are together."
Prince Charles told reporters he was "thrilled" with the engagement.
"They'll be very happy indeed," he said.
Monday's announcement said the couple became engaged in London earlier this month and that Harry has informed his grandmother, Queen Elizabeth II, whose consent is needed for him to marry.
Archbishop of Canterbury Justin Welby said the couple would have a church wedding. No date has been announced.
The couple plan to live in Nottingham Cottage at Kensington Palace, where they will be neighbors to William and Kate and other members of the royal family. Markle, who has lived in Toronto since 2011 while filming U.S. legal drama "Suits," is reported to have started the sometimes time-consuming process of moving her dogs from Canada to Britain. She reportedly recently left the television show, a development that helped fueled engagement speculation.
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Congratulations also came in from the queen and her husband, Prince Philip, and from Prime Minister Theresa May. Markle's parents also welcomed the news.
Thomas Markle and Doria Ragland said their daughter "has always been a kind and loving person. To see her union with Harry, who shares the same qualities, is a source of great joy for us as parents."
Markle was raised in the Los Angeles area. Her father is a Hollywood lighting director, her mother a yoga instructor and psychotherapist.
In some ways, Markle — a mixed-race American raised in California, an outspoken full-time actress, and a divorcee — makes a surprising addition to Britain's monarchy.
But the institution has moved on with the times, and the romance between Markle and Harry — who has repeatedly stressed his wish to lead as "normal" a life as he could — has a decidedly unstuffy, modern feel to it.
The announcement means another grand royal wedding may be in the offing — the first since William and Kate married in 2011 — though it is possible the couple may choose to have a private ceremony, perhaps in a remote location far from the paparazzi who bedeviled Harry's mother, Princess Diana.
Markle, best known for her role as an ambitious paralegal in "Suits," surprised many when she shared her feelings for Harry in a September cover story for Vanity Fair.
Asked about the media frenzy surrounding their courtship, the 36-year-old said: "At the end of the day I think it's really simple ... we're two people who are really happy and in love."
Harry, once known for his dicey antics, including being photographed playing strip billiards in Las Vegas, has largely charmed the British public with his winning smile, his military career and his devotion to charities aimed at helping disabled veterans and other causes.
The 33-year-old prince recently won praise with his work campaigning for more openness about mental health issues. Speaking candidly about his personal struggle to cope with the loss of his mother when he was only 12, he encouraged others to talk about their own problems rather than keeping them bottled up inside.
Markle's Vanity Fair interview broke new ground. It is unusual for a royal love interest to speak so publicly, and candidly, before becoming engaged.
Harry's past reported girlfriends all shied away from the media limelight, and his sister-in-law, formerly known as Kate Middleton, stayed silent until she and Prince William gave a formal televised interview at Buckingham Palace after their engagement became public.
It won't be the first time that a British royal has married an American, or a divorced person. 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.