Jennifer Garner boyfriend is John Miller. He is the CEO of CaliGroup, a restaurant group that owns the chains True Food Kitchen and Mendocino Farms. Jennifer Garner's current boyfriend is John Miller. He is the CEO of CaliGroup, a restaurant group that owns the chains True Food Kitchen and Mendocino Farms. Garner and Miller have been relatively private about their relationship, but they have been seen together on several occasions. In 2019, they were photographed on a vacation in Italy.