Former TVA reporter Armand Dubois will run for the Liberals against Peladeau in Saint-Jerome, north of Montreal.
TVA is Quebec's biggest French-language television network and was bought by Peladeau's Quebecor in 2000.
Dubois's biography on Linkedin says he worked for TVA between 1986 and 2002.
Dubois was also involved in the union when employed at TVA.
The current radio host has also worked in communications.
Also running against Peladeau is Patrice Charbonneau, a real-estate agent who is trying to win the seat again for the Coalition party.
Charbonneau stepped in after noted anti-corruption crusader Jacques Duchesneau announced he would not seek re-election.