The nervous 26 year old was so eager to please Tv executives at her audition she agreed to show off her dancing skills.
She says, "It was a lot of adrenaline, I was very nervous. It was a big deal. There were lots of people from (cable network) HBO there and I was kind of anxious and I did all of the scenes, and at the end, I said, 'Is there anything else I can do?'
"(Showrunner David Benioff) then suggested I do a dance. So I did. I don't know how to do it, but I did the funky chicken and it kind of morphed into the robot and I heard some laughter and I thought, 'Comedy gold, this is brilliant. I'm nailing it'."
Clarke did not initially land the part, but was eventually cast after British actress Tamzin Merchant was replaced for undisclosed reasons.