Tamara Ecclestone and Jay Rutland were married in a simple registry office ceremony on Monday.
The celebration follows the couple's wedding blessing on the French Riviera in June, where celebrity guests included Jason Statham, Rosie Huntington-Whiteley, Sean Connery and Nicola Roberts.
"When I met Jay, I knew this was the man I was going to marry," said Tamara, speaking to HELLO! exclusively on a previous occasion.
"I've never been in a relationship before where I've been able to be myself and feel so comfortable so quickly. When you find true love, why wait?"
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Back in London, newlyweds Tamara and Jay were seen walking hand in hand out of the Kensington and Chelsea registry office and were greeted with showers of confetti from Tamara's sister Petra and her husband James Stunt.
Petra and James seemed to be the only guests in sight, showing the bride and groom were trying to keep their registry wedding under wraps compared to their previous celebration.
Tamara and Jay looked over the moon and clearly enjoyed the warm weather, donning stylish sunglasses.
The new bride wore a cream, fitted dress with a ruffled hem that fell just above the knee, showing off her tanned and toned legs.
She kept her accessories simple to flaunt her glittering diamond wedding ring, opting for simple studs and a gold watch. Jay, meanwhile, looked dapper in a three-piece grey suit and tie.
The celebration comes weeks after Tamara and Jay hosted their lavish party at the luxury Grand Hotel du Cap Ferrat, near Monaco.
Dressed all in white, the sun-kissed couple and their host of guests partied on the beach with plenty of drinking and dancing.
Wearing a white bikini and kaftan, Tamara was seen happily embracing Jay in the water before they headed out on a yacht trip together.
The couple met in January after being introduced by friends and were engaged within a month.
"Our engagement has been very sudden," said Tamara, speaking exclusively to HELLO! "I get there are people who won't understand that. But my response to that would be, 'When you know, you know.'"