Ex-conman Lewis will be left stunned when former girlfriend Penny - to be played by Crossroads legend Sue Hanson - visits Weatherfield, according to Inside Soap.
"Audrey adores Lewis and truly believes they've put their difficult past behind them," an insider teased.
"But Penny's arrival will shine a light on Lewis and the way he used to conduct himself."
Penny's brief stint on the cobbles coincides with a temporary departure for Lewis, due to actor Nigel Havers's commitment to a Christmas pantomime.
Audrey and Lewis's romance has stayed strong since reuniting earlier this year.
Phil Collinson confirmed to Digital Spy last month that, contrary to reports claiming Lewis would be killed off in a car accident, the character would return after his break. Later reports indicated that Havers had signed an extension to his contract lasting until 2013.