Sue Cleaver, who plays Eileen Grimshaw on Coronation Street, was adopted at 10 days old - and then discovered her birth mum was married to one of her co-stars

The mystery began to unravel during a cast lunch when Michael teased Sue about her Northern accent and inquired about her origins. Upon learning she was born in Barnet, Greater London on September 2, 1963, Michael urgently contacted his wife Lesley with the words: "I've found her."

Sue Cleaver did not know who her birth mother was until she had already started acting, making the bombshell discovery after a co-star said 'she's the spitting image of my wife'