Henderson grew up Kincardine, Fife, but moved to London when she was seventeen to study at the Guildhall School of Music and Drama. Her big break came in 1987 when she landed a role in the children?s TV drama, `Shadow of the Stone?. She spent several years working in theatre before being cast in the BBC TV series `Hamish Macbeth? followed by roles on the big screen in `Rob Roy? (1995), `Trainspotting? (1996) and, more recently, two of the Harry Potter films. In 2011 she was in the mini-series `The Crimson Petal and the White? and 2012 sees her starring in the film adaptation of Robert Louis Stevenson?s famous story, `Treasure Island?.