Claire Sweeney is to join the cast of Coronation Street as the mother of Weatherfield mechanic Tyrone Dobbs.
Tyrone has been told by his grandmother Evelyn that her daughter and his biological mother Cassie is dead.
So when Cassie turns up on the cobbles out of the blue in June, Evelyn is faced with a real dilemma as she has to decide whether to come clean to Tyrone about her lies.