The actress has landed the role of Sinead Tinker, who is the niece of outspoken Underworld worker Beth (Lisa George).
Sinead is a possible love interest for young dad Chesney Brown (Sam Aston) as she quickly catches his eye when she arrives in Weatherfield this spring.
With Chesney's girlfriend Katy Armstrong embarking on a fling with Ryan Connor in the coming weeks, the appearance of Sinead could give the market trader something to smile about again.
A statement on the soap's official website teased: "As Katy struggles to resist the temptation of smooth talking Ryan, Chesney faces a heartbreaking few months. Will new girl Sinead be his light at the end of the tunnel?"
McGlynn is best known for playing Scout on BBC One's Waterloo Road.
Scout is still on screen in the popular drama, but will be leaving in episode 20 of the current series.
Coronation Street continues tonight (February 22) at 7.30pm and 8.30pm on ITV.
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