Rachel Brosnahan knew David Corenswet was the perfect Superman even before he was cast as the Man of Steel during a screen test: “When we were auditioning together, I was also doing a play, so I had to leave really quickly. I was leaving and I knocked on the door, and he was there in his Superman costume, auditioning. I thought, ‘Superman is in the building.’ It was amazing. It was one of those electrifying moments that seems really rare. I knew at that moment that it was going to be David.”