She had the title role in "Lorna Doone" and she's also appeared in The Aristocrats (as Lady Cecilia, the youngest Lennox sister), Take a Girl Like You and Mansfield Park (playing younger Fanny to Frances O'Connor). These days, Amelia can be found writing music under the name of "Slow Moving Millie".
Cecilia (Amelia Warner) with Louisa (Anne Marie Duff)
Shown with Sarah (Jodhi May)
Shown with Emily (Geraldine Sommerville)
She adapted one of her songs for this Virgin ad and has some songs on MySpace.