The 97th Grey Cup was played on November 29, 2009, at McMahon Stadium in Calgary, Alberta, and decided the Canadian Football League (CFL) champion for the 2009 season. The Montreal Alouettes came from behind to defeat the Saskatchewan Roughriders 28-27, on a 33-yard field goal by Damon Duval as time ran out. Duval had actually missed a first attempt, but Saskatchewan was penalized for having too many men on the field, allowing Duval a second field goal attempt.

Montreal running back Avon Cobourne was named the Most Valuable Player of the game. Alouettes slotback Ben Cahoon received the Dick Suderman Trophy as the Grey Cup's Most Valuable Canadian.

This was the fourth Grey Cup to be held in Calgary; the others were the 63rd Grey Cup (1975), the 81st Grey Cup (1993), and the 88th Grey Cup (2000). The game featured the Western Division Champion Saskatchewan Roughriders and the Eastern Division Champion Montreal Alouettes. It was the first time ever that these two teams played each other for the Grey Cup.

The prices for tickets ranged from $195 to $370 (Canadian dollars) for the general public. Stampeders season ticket holders were eligible for reduced rates, with prices between $119 and $295. The game sold out in August 2009.

On September 21, 2009, the Calgary Grey Cup committee announced that the 97th Grey Cup would feature the return of an official Grey Cup parade. They later named Elisha Cuthbert grand marshal of the parade, on November 13. On October 12, it was announced that Blue Rodeo would be the halftime show. The week's festivities also included the ENMAX Street Festival and Stage on Stephen Avenue; the Calgary Herald Olympic Plaza Family Fan Fest; the Molson Canadian Quick Six Saloon at the Telus Convention Centre; the Scotiabank Grey Cup Gala Dinner and Contest at the Pengrowth Saddledome, featuring Great Big Sea; and the McMahon Stadium Pre-Game Party with live entertainment featuring Econoline Crush.

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