Numerous forms of speech therapy failed him, until, at 16, he had a breakthrough. "I resolved that if I was going to stutter for the rest of my life, people were going to be stuck listening to me. I had been depressed, but now I was angry – I decided I deserved to be heard." That is when, in rage he spoke the 'F' word, or "naughty word" as he recalled decades later. Two weeks later he auditioned for his school play, Shaw's Androcles and the Lion and even got a small role, of a Christian eaten by a lion. In 2005, he used it in a scene in his stage play about George VI. Seidler later attended Cornell University, where he graduated with a A.B. in English in 1959.