Does Ben Affleck have a new leading lady? Has Ben Affleck been caught getting cozy with Sienna Miller on the set of their new movie, Live By Night? Report: Ben Alleck & Halle Berry Could Be The Next A-List Couple Following rumors regarding a possible romances with both Halle Berry and Kate Beckinsale, as well as a potential reconciliation with Jennifer Garner, the mother of his three children, Affleck has been linked to a fourth actress.