Helena Bonham Carter didn't struggle to find compassion for Colin Firth's character in The King's Speech.
"I found Colin so innately touching," she revealed.
"He's done stammerers before, he's got a gift for it, and I knew the compassion would be very easy," she explained.
The 44-year-old actress plays the Queen Mother in the period drama which traces stammering King George VI's (played by Firth) impromptu ascension to the throne and his work with a speech therapist (Geoffrey Rush).
"I did love the story, I wanted to play George VI but he was already cast!" Helena jokes.
But she only just managed to squeeze working under the direction of filmmaker Tom Hooper into a hectic schedule.
"This was my weekend job, I was doing Harry Potter in the week, I also have two children and I kept on saying to Tom 'I do have a duty to see them at some point!'
She jokingly revealed: "He just wouldn't take no for an answer. I call him Thomas the Tank Engine because he's so focused and stubborn that once he gets an idea into his head he will ignore everyone else's wishes, desires, children and family and get what he wants!"
The King's Speech is released in cinemas on Friday, January 7.