While many were thrilled to see the star, others simply couldn’t believe it was really him.
"That really looks like Ben Affleck," one person said while approaching the car to get a closer look. In fact, Affleck, 43, even had to grab a one woman’s hand and have her touch his face to prove he was real.
And one lucky fan actually got to take a spin with the actor in the driver’s seat around Warner Bros. studio lot in the Batmobile.
Check out all the guests' excitement in the video below, which was made as part of an Omaze campaign to benefit three different charities and offers a chance to win a ticket to the red carpet premiere of the highly anticipated movie that hits theaters on March 25.
In addition to being a superhero on-screen, Affleck is clearly one at home with his children as well.
In a new interview with Vanity Fair, his estranged wife, Jennifer Garner, opened up about how despite their split, they are “completely in line,” when it comes to their three children.
"The main thing is these kids -- and we're completely in line with what we hope for them," Garner insists. "Sure, I lost a dream of dancing with my husband at my daughter's wedding. But you should see their faces when he walks through the door. And if you see your kids love someone so purely and wholly, then you're going to be friends with that person."
The couple has continued to show love for one another, even spending time together during the Vanity Fair Oscars after party. To see who Garner left the party with, watch the video below.