Ben Affleck, Jennifer Garner And Kids Spent Christmas In Montana, Source Says

Ben Affleck and Jennifer Garner celebrated Christmas as a family.

According to an insider, the "Justice League" star joined Garner and their three children Violet, 12, Seraphina, 8, and Sam, 5, on Christmas Day. The amicable exes spent the holiday as a family in Montana.

"They had a great Christmas together in Montana. It's a lot of snow and everyone had fun," a source told People.

Garner and Affleck arrived in Montana separately. They have a property at an exclusive private ski resort and they spent the holiday there.

"The Tribes of Palos Verdes" actress was joined by some of her family members. She stayed in Montana longer than Affleck. Garner is reportedly a huge fan of the place. "Jen loves Montana. It's very quiet and she enjoys the privacy," the insider added.

Meanwhile, Affleck flew back to California immediately after Christmas. In fact, he was spotted with his girlfriend, Lindsay Shookus, on Tuesday. They were spotted together with matching outfits walking around Malibu.

Affleck and Shookus are reportedly sharing a luxury apartment in New York City. The "Batman" actor is paying for the Upper West Side apartment and stays there with Shookus when he is in the city. The apartment's lease costs an average of more than $28,000 a month, People reported.

Affleck's 2,761 square foot apartment includes 3 bedrooms and offers panoramic views of Central Park and the Hudson River. In addition, it has a private movie theater, pool and 24/7 butler service.

Garner and Affleck also spent Thanksgiving together. At the time, the "Argo" actor is continuing his alcohol addiction treatment. Earlier this month, Affleck was seen leaving a residential facility with two women, who were believed to be his coaches. The actor has been honest about his lifelong battle with alcohol addiction.

In March, Affleck announced that he completed an alcohol treatment. He confessed that he is doing this to be the best dad and will continue to confront it.

"I have completed treatment for alcohol addiction; something I've dealt with in the past and will continue to confront. I want to live life to the fullest and be the best father I can be," Affleck wrote on Facebook."I want my kids to know there is no shame in getting help when you need it, and to be a source of strength for anyone out there who needs help but is afraid to take the first step.