who is ben affleck dating
Ben Affleck Finally Moving On: Dating Co-Star Sienna Miller. Last June, Ben Affleck and Jennifer Garner made it official that they were divorcing after a 10-year marriage. That hasnât stopped Ben Affleck from trying to move on. Design and Trend announced that Ben Affleck is possibly dating his co-star of Live by Night, Sienna Miller. Sienna Miller is apparently dating Ben Affleck. (Photo by Grant Lamos IV/Getty Images) Ben says that he plans to keep things casual rather than serious for the time being so that he can concentrate on his children, Violet, 10, Seraphina, 6, and Samuel, 3.