Melanie played Maggie Croft, head of the canteen at Waterloo Road, before marrying long-suffering teacher Grantley and changing her surname to Budgen.
In Corrie, the actress is taking on the role of recently widowed Cathy Matthews, who owns the allotment next to Roy and Sharif's plot.
Cathy and Roy are set to strike up a friendship, especially after he learns she is trying to come to terms with the death of her husband. Could this be Roy's first chance of romance since Hayley's death?
Corrie producer Stuart Blackburn says: "Recently widowed, Cathy is an engaging yet sometimes chaotic woman. Though her indecision can drive her friends mad, behind the vulnerable front is a woman who truly does have a heart of gold.
"Gentle, kind and intelligent, she has more to offer than she knows and, in Roy, she'll find a friend who will ultimately bring out the best in her.
"We are delighted that Melanie Hill has agreed to join us and take on the role. Familiar I'm sure to our audience, Melanie is an incredible actress who I know will soon propel Cathy to the heart of Coronation Street."
Melanie adds: "I'm chuffed to bits to be joining the cast of my favourite soap. My family and I grew up watching it and to actually be working on it is a dream come true."
The actress, who recently starred as Cilla Black's mum in the ITV drama Cilla, will make her on-screen debut in April.
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