The 60-year-old TV personality will play a thief in the ITV1 soap and is hoping it will turn into a long-term role.
Les' character, who is a petty criminal, is called Michael Rogers and he says he is "thrilled" to have landed the part.
Speaking to The Mirror, Les admitted that Coronation Street is his "favourite" TV programme.
The former Celebrity Big Brother contestant added: "I am so thrilled to be joining the cast of Coronation Street. I've loved it since the beginning. I grew up watching all the amazing characters in the show ."
Coronation Street has been going from strength to strength lately. Earlier this week, the cast and crew walked away with the gong for 'Best Serial Drama' at the National Television Awards.
Actress Julie Hesmondhalgh also won the award for 'Best Serial Drama Performance'. This came just two days after she was highly praised for her portrayal of Hayley Cooper, who died in the soap on Monday night (20 January).
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