Cheryl will appear in the ITV1 soap as a childhood friend of Michelle's character Tina McIntyre on Friday 20 December.
In the storyline, the Girls Aloud star is hoping to travel up to Newcastle for her mum's Christmas party with Tina, however, it doesn't appear to go according to plan...
Cheryl has filmed the scenes for this year's Text Santa charity appeal, which is raising money for Age UK, Barnardo's, BeatBullying, British Heart Foundation, CLIC Sargent and Help the Hospices.
In a series of sneak peek pictures, Cheryl can be seen arriving on the Corrie set in Manchester after pulling up outside the Rovers in a flash convertible mini.
Cheryl is dressed in a cosy roll-neck cream jumper which has been teamed with a brown skirt and dark knee-high boots.
In another photo, taken when the cameras weren't rolling, Cheryl is posing behind the bar with Michelle as they pretend to pull pints.
She can also been sat at a table in the famous pub and posing with Michelle's fellow Corrie stars.
Speaking about the special episode, Cheryl said: "It [Coronation Street] has always been part of my life, we'd all watch it as kids every night.
"It's surreal to be part of something I've watched my whole life.
"It's great to be able to support six wonderful charities and I really hope that this year's appeal makes a difference to many lives."
Catch Cheryl in Coronation Street at 8pm on ITV1, Friday 20 December.