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.

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 (http://on.freep.com/Ubu0u2 ) says the family welcomed the visitors.

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.

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

Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.