Maria Puente

USA TODAY

Well, they did it. The improbable romance of media mogul Rupert Murdoch and American ex-model and mother of Mick Jagger offspring Jerry Hall culminated Friday when the two got hitched in London..

And they did it at Princess Diana's family townhouse, Spencer House, an 18-century palace in central London still owned by the late Diana's brother, the Earl Spencer, and said to be the finest of London's surviving palaces of the era.

Murdoch tweeted his happiness in maybe his last tweet for 10 days...or ever.

Murdoch, 84 and on his fourth marriage, and Hall, 59, on her first legal marriage, were snapped emerging with smiles from Spencer House, dressed in decidedly casual clothes.

He was in a navy suit.

Rupert Murdoch and Jerry Hall announce their engagement

She wore a blue skirt, extending below the knees, and what looked like Roger Vivier $650 black pilgrim-buckle flats (so the tall blond doesn't tower over Murdoch). She had on a short white trench coat, possibly by MaxMara, according to the Daily Mail, and carried a crocodile-print handbag. Her long hair was loose and curly.

Oh, and she flashed an impressive marquise diamond ring — not as gob-smacking as the 35-carat rock Mariah Carey got from her own Aussie billionaire fiancé, but big enough to see in a paparazzi photo from afar. The Mail reported it's a 20-carat diamond that cost Murdoch millions.

But the billionaire chairman of News Corp can afford it.

Murdoch's News U.K. confirmed the couple, who announced their surprise engagement in January, had married.

Hall and her former partner Jagger had an unofficial private Hindu marriage ceremony in Bali, Indonesia, in 1990. But it wasn't legal, unbeknownst to Hall, and during their divorce proceedings in 1999, a British court declared the marriage invalid.

But she has four children with Jagger. Murdoch has six children with his three previous wives. The six daughters of the couple were at the ceremony as bridesmaids, according to the Sydney Morning Herald.

All of the 10 children (and many Murdoch grandchildren) are expected at the celebration ceremony the couple are having Saturday at St. Bride's, the "journalists' church" in London's Fleet Street (even though Fleet Street is no longer the home of British newspapers in large part thanks to Murdoch).

Contributing: The Associated Press