Natasha Dervill O'Keeffe 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), Lizzie Shelby in the BBC series Peaky Blinders (2013–2022), and Lanfear in the Amazon Studios series The Wheel of Time (2021–2025).