While prepping for the film, Firth turned to a family member to help figure out how to approach his character’s stutter. His sister is a voice therapist, and proved “extremely helpful in terms of the exercises that can be done”.
A speech therapist was also enlisted during rehearsals. In the end, though, Firth relied on the script for the most help. “I think the best consultant I had was David Seidler the screenwriter,” he says, “he was so compelling about the experience and what you do in life to negotiate around the speech problems that you have. The fact that it has a profound affect on your identity, because you don’t do what you want to do. That insight and what my sister gave me were definitely the most useful help I got.”