Susan Johnston OBE (née Wright, born 7 December 1943) is an English actress known for playing 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).