Brookside and West End star Claire Sweeney is to join the cast of Coronation Street as the mother of Weatherfield mechanic Tyrone Dobbs.
Evelyn Plummer (Dame Maureen Lipman) told her grandson Tyrone (Alan Halsall) that his biological mother Cassie is dead.
However, the soap stalwart will be floored when Brookside star Claire turns up on the cobbles as Cassie and Evelyn will be forced to come clean about her betrayal.