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.