The 46-year-old actor was snapped smiling big in Los Angeles on Monday morning amid the news that he and Sexton have split. Affleck wore a blue plaid shirt, black jeans and brown boots and appeared to be in a good mood as he sipped on his ice coffee.
On Tuesday, ET learned that Affleck and 22-year-old Sexton ended their brief relationship. The two were first linked in August when they were spotted during a dinner date in Malibu.
“It was casual and not serious," a source tells ET of the pair's time together. "Ben’s only priority right now is his sobriety and his family.”
"It's very hard for anyone who is close to Ben to trust Shauna because they don't know her and she seemed to come out of nowhere," the source said. "The one thing everyone knows is Shauna is not sober, she is incredibly young, and she came into Ben's life at his lowest point. They wish that Ben would hold off on a relationship for now."