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We still can't believe how much Ben Affleck bulked up for Batman vs. Superman!

On Friday the hunky star ran errands in his vintage Chevelle, and earlier this week director Zack Snyder gave us our first peek at Ben in the Batman costume, and we were NOT disappointed! Though the 41-year-old star might have been giving a little bit more definition in the chest area, it looks like the arms are all his!

Ben is set to return to the Detroit set of Batman in the next few weeks, and wife Jennifer Garner and their three kids are supposedly going to spend the summer in Michigan with him.