Evan Agostini / Invision/AP 1 / 9
Evan Agostini / Invision/AP 1 / 9

SOUTHFIELD, Mich. (AP) — The actor who plays the caped crusader in the upcoming "Batman v. Superman Dawn of Justice" film surprised a group of children at a Detroit-area superhero party.

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Ben Affleck and his actress wife, Jennifer Garner, stopped Sunday at Detroit Kid City in Southfield and asked if they and their 2-year-old son, Samuel, could join the party.

The Detroit Free Press says the family welcomed the visitors.

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Affleck is in Detroit for the filming of the Warner Bros. Pictures movie. The movie's release is set for May 2016.

The indoor Detroit Kid City features a kid-sized market, cabin, auto factory, schoolhouse and other buildings.

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Detroit Kid City worker Garrett Dixon says Affleck "was very interested in getting a Detroit Kid City out in L.A."