Naomi Watts’ son Sasha, 16, towers over his mum as he walks the actress down the aisle during wedding to Billy Crudup in Mexico City

Naomi Watts and Billy Crudup married for the second time on Saturday, almost a year after their first courthouse wedding.

And the couple were supported by their children on the big day.

The Mulholland Drive star, 55, turned to her 16-year-old son Alexander “Sasha” Schreiber to walk her down the aisle.

Sasha, who towered over his mother, looked dapper in a dark suit and tie as he gave the actress away.

Naomi’s youngest, Kai, 15, and niece Ruby were bridesmaids, and they wore strapless champagne-colored dresses with ruffles at the waist.

Naomi Watts was walked down the aisle by her son Alexander ‘Sasha’ Schreiber as she married Billy Crudup for the second time in Mexico City this weekend

Naomi Watts, 55, (right) and Billy Crudup, 55, (left) married for the second time on Saturday, almost a year to the date of their first courthouse wedding

Both teens had their hair styled straight and pulled back into half ponytails.

Naomi shares both her children with ex-partner Liev Schreiber, 56.

Traditionally, the father of the bride walks his daughter down the aisle.

However, the actress’ father, Peter, who worked as a sound engineer for Pink Floyd, tragically died of an apparent heroin overdose at the age of 31, when Naomi was seven years old.

Sasha looked dapper in a dark suit and tie as he gave away his mother

Billy’s son William, 20, who he shares with ex-partner Mary Louise Parker, was also in the wedding party.

For their second ceremony, Watts and Crudup, 55, hosted a lavish ceremony and reception for family and friends in Mexico City.

Naomi looked every bit a blushing bride in a white sequin dress with a draped neckline and a flowing trail as she carried a bouquet of white anemone in her arms.

Naomi’s child Kai, 15, and niece Ruby were bridesmaids and wore strapless champagne-colored dresses with ruched waists

Naomi didn’t stay in her statement dress all night, as a photo shared by actress friend Gina Gershon from the couple’s first dance showed the actress in a different dress.

The black and white photo showed Naomi being spun around the floor by Billy while wearing the beautiful lace dress she wore to her courthouse ceremony last year.

Billy, 55, looked handsome in a traditional black suit.

Billy’s son William, 20, (pictured), who he shares with ex-partner Mary Louise Parker, was also in the wedding party

Naomi’s brother Ben shared an Instagram Story video of proud mum Myfanwy Edwards Roberts getting emotional before the ceremony.

The bride’s best friend, Nicole Kidman, attended the lavish ceremony, which appeared to take place in a museum.

Other guests included Isla Fisher, Justin Theroux and girlfriend Nicole Brydon Bloom, who shared a photo of their outfits and the beautiful scenery.

For their second ceremony, Watts and Crudup hosted a lavish ceremony and reception for family and friends in Mexico City