It's certainly nice to see the Batman v Superman actor with a smile on his face, a rare sight in public since his split with his wife, Jennifer Garner, was announced last year.
The former couple have been focusing on keeping things friendly for their three children, and Affleck talked recently with Jimmy Kimmel about his "mortifying" appearance as Batman at his son Samuel's birthday party.
Garner recently went public about the end of the couple's relationship in an interview this month with Vanity Fair, where she said of her ex: "When his sun shines on you, you feel it. But when the sun is shining elsewhere, it's cold." Affleck has yet to comment on the interview.
ET recently caught up with Garner at the premiere of her new film, Miracles From Heaven, where she addressed the candid tell-all. Watch the video below to hear more.