Royal wedding: Prince William to marry Kate Middleton
Prince William is to marry long-term girlfriend Kate Middleton next year, Clarence House has said.
William, second in line to the throne, will marry in London next spring or summer and live in north Wales, where he is serving with the RAF.
The couple, both 28, met at St Andrews University, Fife, became engaged in October while on holiday in Kenya.
Prince Charles said he was "thrilled, obviously", joking: "They've been practising long enough."
They began dating eight years ago while studying at St Andrews University in Fife, where they shared a house.
The royal engagement was announced in a brief statement released by Clarence House.
It said: "The Prince of Wales is delighted to announce the engagement of Prince William to Miss Catherine Middleton.
"The wedding will take place in the spring or summer of 2011, in London. Further details about the wedding day will be announced in due course.
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We have become slightly cynical, perhaps, slightly sceptical. We all lived through the fairytale royal weddings of the 1980s and we know where they ended up.
But I know many people who are actively thinking about where they will place their picnic tables and chair once they have a date. These are occasions that people do delight in, in this country.
I don't think William of all people wants to do a rerun of his parents' ill-fated marriage and for that reason I think the wedding is unlikely to be in St Paul's Cathedral.
The Guards Chapel, which was the setting for the 10th anniversary memorial service for his late mother, I suspect, may be too small, given that we are talking about the marriage of a future king.
That's why inevitably, I suspect, the wedding will be at Westminster Abbey where, of course, his grandmother the Queen married in 1947.
"Prince William has informed the Queen and other close members of his family.
"Prince William has also sought the permission of Miss Middleton's father."
The Queen said she was "absolutely delighted" for both Prince William and Kate Middleton.
Prime Minister David Cameron said the engagement marked "a great day for our country" and wished the couple a long and happy life together.
He said he had received the news in a call from Buckingham Palace during a cabinet meeting, and it was greeted with "a great cheer" and "banging of the table" from fellow ministers.
He had slept overnight on the Mall ahead of Diana and Charles' wedding, he added.
Leader of the Labour party Ed Miliband said "the whole country will be wishing them every happiness".
Scotland's First Minister Alex Salmond said William and Kate's romance was "a match made in St Andrews" and everyone in Scotland would join him in wishing them well.
The Countess of Wessex said the royal family was "absolutely thrilled and we all wish them all the luck and love in the world".
James Whittaker, who has reported on the Royal Family since the 1960s, said life as a princess will be "very very demanding".
Dickie Arbiter, the Queen's former press secretary, told the BBC: "She'll become a service wife.
David Cameron said Prince William was ''extremely excited''
"He'll have to do his statutory royal duty, his royal bit, but he will be very much a working helicopter pilot with RAF search and rescue for the next three years, and Kate will have to get used to living in North Wales, although I think she's pretty much used to it at the moment."
Meanwhile royal commentator Margaret Holder said she thought the marriage would give Prince William the warm, cosy, family life he wanted.
"What he's finding with the Middleton family is what he didn't have as a child and I think that's very good for him.
"I think this is going to be a very, very good and successful marriage. And I think this will take the monarchy through well into the 21st Century. I think Kate is very modern, she's very relevant."
Prince William and Kate Middleton both started out on the same history of art course at St Andrews in 2001, although William later switched to geography. For several years, they shared accommodation with friends.
Miss Middleton, who is six months older than William, was credited with persuading the prince to stay on as he struggled to adjust to university life during his first year.
Prince Charles said he was "thrilled, obviously" about his son's engagement
They graduated in the same ceremony from St Andrews in 2005 and their families joined them for a celebratory lunch.
The couple's relationship was exposed in 2005 when they were photographed together on the Swiss ski slopes of Klosters.
They split briefly in 2007, but more recently Miss Middleton - who has no royal or aristocratic family connections - has been to several official events, heightening speculation of an engagement.
Miss Middleton is the eldest child of businessman Michael Middleton and former air hostess Carol.
She was raised in a modern five-bedroom detached house in the Berkshire village of Bucklebury and her family, who are self-made millionaires, run a mail order toy and party goods company.
The couple will marry in the year which would have marked the 30th anniversary of Prince William's parents' wedding.