[1] Miller is best known for her role as DC Carol Browning in the British detective series The Commander.
Miller has a role in the ITV television movie If I Had You, and also acted in Series 2 of Red Cap.
Miller played Mary Magdalene in The Last Days of Judas Iscariot at the Almeida Theatre.
In the BBC's remake of E. F. Benson's Mapp & Lucia (2014) Miller played the Padre's wife, Evie Bartlett, a character from the original books who had not appeared in ITV's 1980s adaptation.
In May 2016, it was announced that Miller had been cast as Ginny Weasley in Harry Potter and the Cursed Child.