Sue Johnston is an English actress. She is known for portraying Sheila Grant in the Channel 4 soap opera Brookside (1982–1990), Barbara Royle in the BBC comedy The Royle Family (1998–2012), Grace Foley in the BBC drama Waking the Dead (2000–2011), Gloria Price in the ITV soap opera Coronation Street (2012–2014), and Miss Denker in the ITV drama Downton Abbey (2014–2015).