Well, according to Krasinski's License to Wed director, Ken Kwapis, there's a finite number of contortions: six. In a half-serious, half-jokey interview with the Los Angeles Times, Kwapis confined Krasinski's facial expressions to the single digits. And, what's more, the paper even put together a photo gallery of the half-dozen expressions they think are the most common, from "the grimace" to "the happy."
It's pretty funny to see all those faces one after the other, flipbook-style. But after spinning through the gallery, I think six is pretty conservative; at the very least, Krasinski's bugged-out eyes deserve their own spot on the list. Take a look and tell me what you think. What's your favorite John face?