Emma Jaye Jacobs (born 27 May 1982), known professionally as Jaye Jacobs, is an English actress. She is best known for playing the role of Donna Jackson in BBC medical drama series Holby City (2004-2011, 2017-2022) and Casualty (2023). Jacobs also portrayed deputy headteacher and science teacher, Sian Diamond in the BBC school-based drama series, Waterloo Road (2011-2013).