Joe Duttine arrived on the soap as Tim Metcalfe last week, the biological father of adopted 10-year-old Faye Windass.
However, the actor previously played detective Max Carr for several months in 2010, who was involved in the plot surrounding Gail McIntyre being accused of murdering husband Joe.
The new role saw some viewers take to Twitter after noticing the familiar face.
Amanda Pickering tweeted: "Do the producers think we'll have forgotten last time Joe Duttine was in #corrie he played a policeman?"
Angela Francis added: "#Coronation Street seems to be reusing its bank of actors over and over again. #TimMetcalfe."
Mrs McIntosh posted: "You'd think they'd credit the audience with a bit more savvy."
A Coronation Street spokesman told The Sun: "Joe is a talented actor who brings something completely different to the role of Tim Metcalfe than he did to his previous role."
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