Don't Knock Twice is the story of a guilt-ridden mother, played by Katee Sackhoff, who must encounter the truth behind the legend of a vengeful witch in order to reconnect with the estranged daughter she placed into care.
Lucy (represented by United Agents) started acting aged 11 when she was cast as the young Beatrix Potter alongside Renée Zellweger in the movie Miss Potter. She went on to film Ballet Shoes for the BBC with Emma Watson, as well as playing Margaret Dashwood in the BBC’s 2008 adaptation of Sense & Sensibility.
She'll next be seen on TV in the BBC Two drama Life in Squares, following the entangled lives of the Bloomsbury Group across 40 years, where she plays Vanessa Bell’s daughter Angelica, whose unconventional upbringing was shadowed by family secrets.
At the end of this year Lucy also has two films coming out, Sing Street, about a band looking to find fame in 1980s Dublin, and February, a horror about two girls stranded in their empty boarding school over the winter holidays.