Ellie was transformed into the role of 1960s siren Mandy Rice-Davies on Tuesday, as she filmed scenes for The Trial Of Christine Keeler outside Bristol Crown Court.
The former Les Misérables star rocked a blonde beehive, oversized glasses and a mint green frock as she filmed scenes with co-star Sophie Cookson, who plays the model Christine Keeler.
The BBC drama will tell the true story of two models who were embroiled in a political scandal, when Keeler had an affair with the married Secretary Of State For War John Profumo.
The six-part BBC drama is expected to air in November 2019
See the photos by clicking on the thumbnails below.