Natasha Dervill O'Keeffe (born 1 December 1986) is a British actress. She is known for her roles as Abbey in the E4 series Misfits (2012-2013), Fedora in the ITV series Jekyll and Hyde (2015), Emilia Ricoletti in the Sherlock special "The Abominable Bride" (2016), and Lizzie Shelby in the BBC series Peaky Blinders (2013-2022).