Article continues below advertisementJennifer Garner is taking a cautious approach to cash as she considers marriage to longtime partner John Miller, with sources telling OK! the actress is determined to safeguard her rapidly growing fortune before walking down the aisle again.Garner, 53, the actor best known for roles in 13 Going on 30 and Alias, has been dating businessman Miller, 48, since 2018.The couple briefly separated in 2020 but reconciled and have since built what friends describe as a stable and supportive relationship.