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Mary-Kate Olsen (28) 'secretly marries' Olivier Sarkozy (45) in surprise ceremony

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Olivier Sarkozy and Mary-Kate Olsen in 2013

Olivier Sarkozy and Mary-Kate Olsen in 2013

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Olivier Sarkozy and Mary-Kate Olsen in 2012

Olivier Sarkozy and Mary-Kate Olsen in 2012

WireImage

Olivier Sarkozy and Mary-Kate Olsen in 2012

Olivier Sarkozy and Mary-Kate Olsen in 2012

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Just imagine the dress.

Former child star turned billionaire fashion designer Mary-Kate Olsen (28) has reportedly wed her fiance, Olivier Sarkozy (45).

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Olivier Sarkozy and Mary-Kate Olsen in 2013

Olivier Sarkozy and Mary-Kate Olsen in 2013

FilmMagic

Olivier Sarkozy and Mary-Kate Olsen in 2013

Despite their 17-year age gap, the couple are said to have instantly hit off when they first began dating in 2012 and made it official when he proposed in March of this year.

Celebrity Engagement Rings Close

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Lady Gaga and actor Taylor Kinney became engaged on Valentine's Day.

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Actress Sofia Vergara (L) and her fiance, actor Joe Manganiello became engaged over Christmas and her ring reportedly cost €500,000.

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Mairead Farrell shows off her enormous diamond engagement ring from fiance Louis Ronan

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Nicky Hilton has finally given a glimpse of her impressive diamond engagement ring.

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Actress Riley Keough shared this photo of her with fiance Ben Smith-Petersen

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Footballer Shay Given and his girlfriend Becky Gibson revealed their engagement after a year and a half together

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La Toya Jackson announced her engagement to business partnerJeffr Phillips and proudly showed of fher 17.5 carat diamond ring.

Grainne Seoige and partner Leon Jordaan

Grainne Seoige and partner Leon Jordaan

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Louise Duffy shows off her beautiful engagement ring to former Kerry footballer Paul Galvin

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Kelly Brook has shown off the diamond engagement ring given to her by ex Gladiator David Tornado McIntosh

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ScarJo gave a fresh look at her HUGE engagement ring to French journalistRomain Dauriac.

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Actress Amber Heard flashes her incredible engagement ring to fiance Johnny Depp

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Irish golfer Rory McIlroy proposed to his longtime girlfriend Caroline Wozniacki in Sydney on New Years Eve

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Olivia Palermo is engaged to model boyfriend Johannes Huebl after he proposed in St Barts

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Kanye West proposed to Kim Kardashian in front of the cameras

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Jennifer Love Hewitt with Brian Hallisay

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Reeses beau Jim Toth splashed out on a rare four-carat diamond engagement ring by William Goldberg, said to be worth $250,000. Nice.

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Drew had been dating her art dealer beau, Will Kopelman, for just a year, when he presented her with an engagement ring by Graff. The couple, who married in June, celebrated the arrival of their first daughter, Olive, in September.

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The singers agent boyfriend proposed with a traditional three-carat ring by Neil Lane. But will the wedding actually happen? There are rumours doing the rounds that its all off between the couple, who have been dating since 2009.

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The story behind the models ring is so romantic. Fiance Jamie Hince knew that Zelda Fitzgerald was her idol so he tried to track down Zeldas original diamond ring. When that didnt happen he found sketches and had a similar one designed. Bless!

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Lady Gaga and actor Taylor Kinney became engaged on Valentine's Day.

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Olivier Sarkozy and Mary-Kate Olsen in 2012

Olivier Sarkozy and Mary-Kate Olsen in 2012

WireImage

Olivier Sarkozy and Mary-Kate Olsen in 2012

The pair are often photographed out and about in New York together, but rarely pose together at events.

And now, sources close to the pair have confirmed they secretly wed, although no other details are being released at the moment.

An Olsen insider told US magazine Lucky: "We've received confirmation of Olsen and Sarkozy's marriage from an anonymous, well-connected source. Congrats to the happy couple!"

Olivier is the half-brother of former French President Nicholas Sarkozy and has two children from a previous marriage.

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