As fans of the soap will know, Corrie favourite Tina O'Brien is heading back to Weatherfield as Sarah-Louise after seven years, and she won't be arriving alone.
Teenage mum Sarah-Louise left Weatherfield for Milan in 2007 with her young daughter Bethany.
Now all grown up, 14-year-old Bethany will arrive just before her mum, and it's soon clear that not only do they have a fiery relationship, but Bethany's also got quite an eye for the boys!
Katie, who trained with the National Youth Theatre, beat dozens of hopefuls to land the role.
Preparing to step on the Corrie cobbles, Katie said: "Until I'm actually on set, I genuinely don't think it will sink in that I'm joining the cast of Coronation Street. I know it sounds cliched but it really feels like a dream come true.
"Bethany Platt is going to be such a fun and witty character to play and I hope everyone enjoys her return as much as I'm going to!"
Producer Stuart Blackburn, added: "Full of mischief and with a real lust for life, Bethany is an unpredictable force of nature who will bring joy and chaos in equal measure, turning their household upside down."
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