"I was very, very aware that I was not the first or second choice. I mean, ordinarily, agents don’t do that, and I must admit in my case, it did make it hard for me. Because I didn’t get the sense of humor, really, didn’t understand it very well. It’s not my type of humor, so the director had to kind of coach me through everything I did. It’s by far what I’m best known for on planet Earth. No day goes by without someone commenting on it to me. It turned out to be one of the most beloved films. People had the most astonishing response to it. Apparently by following Rob Reiner, by trying to imitate him—he would do [my lines], and then I would imitate him. And I must have done it adequately, as people compliment me on it on a daily basis."
Actor and playwright Wallace Shawn gives an interview about his movie roles, including his most famous one as Vizzini in The Princess Bride.