Mary-Kate Olsen and her banker fiancé Olivier Sarkozy are now husband and wife, a source confirms this morning.

The pair reportedly got married in an ultra-private ceremony in New York on Friday November 28,

Despite their celebrity status – and Mary-Kate's many contacts in the acting and fashion world – the newlyweds only shared their special day with around 50 guests including their families, a source tells Page Six.

Aside from Mary-Kate's twin Ashley and younger sister Elizabeth, no other celebrity guests have been confirmed.

The wedding took place in a "private residence" on New York's 49th Street – possibly Mary-Kate and Olivier's own €5.9m home – with guests treated to some very unusual refreshments.

Indeed, the wedding decor consisted of "bowls and bowls filled with cigarettes", and "everyone smoked the whole night," according to the insider.

For those not in the mood for smoking, there were also cocktails in a "rear garden" plus dinner for all guests. But don't expect to see your Instagram timeline littered with wedding snaps, as all guests were asked to turn in their phones at the start of the night.

Mary-Kate and Olivier, who share a townhouse in New York, got engaged back in March after almost two and a half years together. Now that they're husband and wife, Mary-Kate will also become stepmother to Olivier's two children, aged 15 and 12. 

Although they did receive some heat at the beginning of their relationship for their 17-year age gap, it seems older men are somewhat of an Olsen tradition. Ashley's currently dating director Bennett Miller who is 19 years her senior.