The mayors of Toronto and Calgary — the two teams' respective hometowns — are also getting in on the action.
Calgary Mayor Naheed Nenshi has proposed a friendly wager that would see the losing city's mayor donating his weight in food to the winning city's food bank.
The loser would also have to wear the winning team's jersey for a council meeting.
Nenshi issued the challenge to Toronto Mayor Rob Ford on Twitter.
Hours later, Ford tweeted his acceptance, adding the Calgary mayor would "look great in Argo blue!"
Ford said he was aware he had more money to lose because he weighed more than Nenshi.
He estimates his weight at around 320 pounds and Nenshi's at 240 pounds.
"It's a friendly wager. So we'll see what happens," said Ford. "I'm really proud of Toronto, I'm really proud of the team."
The mayor said he couldn't wait until the big game.
"Go, Argos go!" he said. "Calgary's going to have their hands full."
The 100th Grey Cup is being held in Toronto on Sunday at the Rogers Centre, the Argos' home field.
(The Canadian Press, CFRB)