Jennifer Garner and her longtime boyfriend, John Miller, are enjoying a festive Christmas season. Garner, 53, and Miller, 47, were spotted exchanging a Christmas cookie tin outside a dark-colored vehicle on Monday, December 22, in photos obtained by the Daily Mail. While Miller opted for a beige sweater with a pair of jeans, Garner looked equally cozy in a gray sweatshirt and black leggings. Garner and Miller, who have seldom discussed their relationship, have been together on and off since 2018. "John is basically living with Jennifer part-time," a source exclusively told Us Weekly in April, noting the businessman moved out of his Los Angeles abode months before the devastating wildfires in January. "He has an office in L.A. and splits his time between staying there and at Jennifer's home." Jennifer Garner and John Miller: A Timeline of Their Relationship According to the insider, Miller was staying at Garner's place "more often" than he had in the years past. "He's been staying with Jennifer more often," the source told Us. "[He] doesn't want to impose, so he's looking for his own place... [and] deciding whether he'll rent or buy." Miller was previously married to Caroline Campbell, with whom he shares two children, before moving on with Garner. The Alias alum, for her part, was married to actor Ben Affleck for 10 years until their 2015 divorce. They now coparent kids Violet, 19, Seraphina, 16, and Samuel, 13. "I'm really lucky that I have a really good coparent and partner in Jennifer Garner, the kids' mom, who's wonderful and great," Affleck, 53, told GQ in a March profile. "We work together well." Garner's close friendship with Affleck also hasn't caused an issue with Miller. Ben Affleck and Jennifer Garner's BF John Miller Share a 'Mutual Respect' "He doesn't get jealous and understands Jennifer prioritizing her kids," a second source told Us in March. "[John] sleeps over at her home often. The way he talks about her is the same. There are no whispers of a status change in their relationship." A third insider, meanwhile, noted to Us that Garner will always have "a soft spot" for Affleck since he's the father of her children. "She will always be there for him, but there is nothing romantic going on," the third source said. In the years since their divorce, both Affleck and Garner have been candid about what went wrong in their marriage - and how they remained friendly. "I didn't marry the big, fat movie star. I married him and I would go back and remake that decision. I ran down the beach to him and I would again. You can't have three babies and so much of what we had," Garner previously told Vanity Fair in 2016. "He's the most brilliant person in any room, the most charismatic, the most generous." She added at the time, "He's just a complicated guy. I always say, 'When his sun shines on you, you feel it.' But when the sun is shining elsewhere, it's cold. He can cast quite a shadow. ... It's not Ben's job to make me happy. The main thing is these kids - and we're completely inline with what we hope for them."