Ashley Jensen (born August 11, 1969) is a Scottish actress. She is best known for her roles as Maggie Jacobs in Extras (2005–2007, for which she was nominated for an Emmy Award), Christina McKinney in Ugly Betty (2006–2010), Agatha Raisin in Agatha Raisin (2014–present), and DI Ruth Calder in Shetland (2023–present). Jensen trained in Drama at Edinburgh’s Queen Margaret University.

Her first significant television role was as Clare Donnelly, daughter of Glasgow criminal Jo-Jo Donnelly (played by Billy Connolly) in the 1993 BBC drama Down Among the Big Boys. In 1994, she played eccentric secretary Rosie McConnichy in the final series of BBC comedy May to December, as a replacement for the character of secretary Hilary (Rebecca Lacey), and Heather in Roughnecks, a BBC television series about workers on a North Sea oil platform. Jensen had a small role in a Dangerfield episode "Contact" as the mother of a young girl with meningitis. She then appeared as Fiona Morris in EastEnders. She also appeared in the 2003 BBC drama Two Thousand Acres of Sky.