The actor and comedian will play Dean Upton, the landlord of Rovers Return’s rival pub, the Flying Horse.
He will go head-to-head with Rovers Return landlord Steve McDonald (Simon Gregson) in a pub cricket match in scenes to be screened in August.
Justin told Coronation Street’s official website: “I’m delighted to be treading the cobbles.
“It’s always been a dream of mine to appear in the Rovers Return, even though as Dean, landlord of the Flying Horse, I feel like I’m a spy!”
Justin – who previously appeared in Peter Kay’s Phoenix Nights and Looking For Eric – will join the Street before taking his one-man stand-up show to the Edinburgh Fringe Festival this summer.