Jennifer Garner ‘Is Very Happy’ with Boyfriend John Miller: She ‘Sees Him Almost Every Day’ (Exclusive Source)

Jennifer Garner and John Miller are going strong as the holiday season progresses.

A source tells PEOPLE that the actress, 52, is “very happy with” her longtime boyfriend, and “spends a lot of time with him.”

“She sees him almost every day,” the insider says.

Per the source, Miller even spent the night at Garner’s house on Thanksgiving, after she and ex Ben Affleck spent the day volunteering with their children. (The pair share Violet, 19, Seraphina, 15, and Samuel, 12.)

“Jen truly just wants her kids to be happy,” the insider tells PEOPLE. “She will continue to make sure that they spend time together as a family and include Ben.”

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The source adds that Garner and Affleck, 52, “have Christmas plans with the kids too.”

“The kids enjoy when they all spend time together,” the insider says. “Jen’s grateful that Ben’s doing well. They are friends, but that’s it.”

Affleck spent Thanksgiving with his ex-wife as the pair were pictured serving meals to the homeless community in Los Angeles at The Midnight Mission‘s annual Thanksgiving Street Fair on Nov. 28.

“They truly enjoy giving back to their community and cherishing quality time together as a family,” a source told PEOPLE of Affleck and Garner’s outing.

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Garner and businessman Miller first connected in 2018, shortly after she finalized her divorce from Affleck, whom she married in June 2005. Affleck, meanwhile, is in the middle of a divorce from Jennifer Lopez, who filed in August after two years of marriage to the actor.

Though Garner and Miller pair were seen together over the years, the actress said she was single in a March 2021 interview with PEOPLE. 

In February 2023, a source told PEOPLE that Garner and Miller “took a long break from dating, but Jen is very happy that they are back together.”

A source told PEOPLE in September that Garner “loves [Miller],” continuing of the couple, “They are serious. He’s also a co-parent and understands her priority.”

“Their relationship is fun and easy-going,” the insider added at the time. “She’s very happy.”