To avoid any alliance or collusion about how the photograph should look, I like to be alone when I do a portrait. I had expected a vanguard of agents or publicists, even lawyers (the usual when you photograph very well known people). When the doorbell rang at the appointed hour in my New York studio, and a voice said, "Dmitri? It's Steve Martin," my spirits rose. I pressed the entry button and waited in front of the elevator doors and out stepped Steve Martin alone.