Nicole Kidman heads to church alone for a Sunday morning service in Sydney as husband Keith Urban jets out of Australia

Nicole Kidman and her husband Keith Urban have been enjoying a Christmas Down Under. 

But on Sunday, Keith headed out of the country ahead of his wife, spotted at Sydney Airport while Nicole attended a local church service. 

The actress popped in for the Sunday service at the North Sydney chapel and appeared to go solo, her children also not seen in tow.

The Moulin Rogue actress opted for a chic all black ensemble including a dress with puffed sleeves. 

She added a pair of satin Mary Jane flats and wore a ribbon in her strawberry blonde curls in the same fabric. 

Nicole finished her look with designer sunglasses and a leather crossbody bag while opting for a natural makeup palette.  

Keith meanwhile kept things casual as he traversed the terminal at Kingsford Smith Airport with a backpack over one shoulder.

The singer wore a fitted black shirt with a graphic print and a pair of jeans as well as white sneakers. 

The country crooner completed his look with a pair of sunglasses and a simple navy cap. 

He beamed as he made his way to his gate for his flight and appears to be leaving the country.  

The couple earlier rang in their Christmas Day celebrations with a visit to a church service in Sydney.

The Hollywood actress and the musician, both 57, returned Down Under for the festive season with their two daughters Sunday Rose, 16, and Faith Margaret, 14.

The family, who live in Nashville, kept to their Christmas traditions as they started off the day by attending a church service at St Francis Xavier Church in Lavender Bay.

The chapel is the Kidman's local church and it holds a special place for them as it was where Nicole's mother Janelle and father Antony's funerals were held.

Stepping out for the Christmas Day service, Nicole cut an elegant figure in a black dress with a ruffled neckline, which she styled with dark sandals.

Nicole's two adopted children, Isabella, 31, and Connor, 29, who she shares with her ex Tom Cruise, are not believed to have joined them on the trip Down Under. 

Nicole has flown back to Australia to reunite with her younger sister Antonia, 54, and her family as they spend their first Christmas without her mother Janelle.

The family have rallied around to support each other during the bittersweet time as they are all spending time together over the festive period.

The chapel where Nicole and her family attended the Christmas Day service holds a special place for the family as they have been regulars there for years.

They also farewelled Nicole's mother Janelle there in September as the family all united for the funeral service.

A decade earlier, Nicole's father Antony's funeral was also held at the St Francis Xavier Church on September 19, 2014.

It is not the first time the Kidmans have visited the church since Janelle's funeral as Nicole joined Keith and her daughters there on Monday, just days before Christmas.

Janelle sadly died at the age of 84 in September - just hours before Nicole won the Best Actress award for Babygirl at Venice Film Festival.

It is tradition for Nicole to jet back to Australia over the Christmas period and she and Keith often host New Year's Eve celebrations at their Sydney Harbour apartments.

Over the past ten years, Nicole has purchased two penthouses in the exclusive North Sydney Latitude building and then combined them to make a mega-apartment. 

While back in Sydney this Christmas, Nicole will no doubt be reuniting with her sister Antonia and her family.

The Kidman clan have already had a festive catch-up in recent weeks after Antonia jetted out to visit Nicole in Nashville at the start of the month. 

Antonia was joined by her daughters Lucia, 26, and Sybella, 17, for the trip as they jetted over to stay in Nicole's $4.9million Nashville mansion.

Lucia, who lives in Sydney, shared festive snaps from the holiday to her Instagram at the time as she documented the trip.

She was joined by her boyfriend Henry Poole, while Antonia's husband Craig Marran also jetted over with them.

Nicole's sister Antonia shares her two daughters and two sons Hamish, 23, and James, 21, with late businessman Angus Hawley, who died in 2015.

She also has two younger sons Nicholas, ten, and Alexander, eight, with her second husband Craig.