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During the quiz, Patti went up against Shaun ‘The Dark Destroyer’ Wallace and managed to bag an impressive £3,000 for charity.
However soap fans were taken aback by her appearance and shared their excitement about the unexpected look on Twitter.
On screen: The actress, 44, is more usually seen sporting a more frumpy look when on the cobbles (pictured with Dev Alahan, played by Jimmi Harkishin)
One person penned: 'Mary Taylor scrubs up well!'
While another added: 'Almost didn't recognise her. Looks slimmer as well.'
And another said: 'Mary looks so pretty.'
Mary’s character left the famous street in 2009 but returned to Weatherfield for the start of 2010.