Hopkins went through a series of makeup tests to make him look more like Hitchcock, but ultimately makeup artists Howard Berger and Gregory Nicotero ended up ditching more elaborate prosthetics, including a fake lower lip. "It looked like a slug," Hopkins said of the appendage. "I thought it best not to push it too much. If they covered me up completely, I wouldn't be visible at all."
Mirren said she has little resemblance to her character. "I don't look anything like Alma. She was a tiny bird of a woman," Mirren said. The movie's real authenticity, the actress said, was in how "Hitchcock" portrayed a marriage. "We all make these sacrifices and compromises with our partners," she said. "Sometimes, you have to claw back and regain some territory. You're constantly trying to find equilibrium in your marriage."