Learning lines
The first was early in 2004 when she played Mary, Queen of Scots in the BBC drama Gunpowder, Treason and Plot.
During filming for the programme she said: "When I was learning lines, I had to be more careful about learning them in English. I had to make sure the pronunciation was correct as well as understanding the meaning."
Triwizard Tournament
Clemence, who was born in Paris, first got her interest in acting from her father, a theatre director and actor. And, after finishing school when she was 16, went on to get an agent and study acting.