The Royle Family actress will play Michelle Collins's character Stella Price's mum Gloria, who arrives in Weatherfield this September.
Soon after arriving, Gloria starts making putdowns towards several residents when she begins to co-run the Rovers Return, reports the Daily Star.
She provides a suggestion box to improve the pub, but one customer describes her as "vulgar and loud".
When Gloria discovers that it was Norris Cole (Malcolm Hebden) and Mary Taylor (Patti Clare), she shouts at them: "Go on, get out. And tell Mary Quite Contrary she's barred an' all."
She also shouts at Dennis Tanner (Philip Lowrie) as she claims that he keeps winking at her.
Gloria then tells Owen Armstrong (Ian Puleston-Davies) that she thinks his building business is a cover for his real life as a gangster. She also fights with several bar staff and tells them how to do their jobs correctly.
Michelle Collins recently spoke of her excitement about Sue Johnston joining Coronation Street as her on-screen mother.