It's standing room only at the East Division Final on Sunday, where the Hamilton Tiger-Cats take on Edmonton in a battle to play for their first Grey Cup win in 20 years.

The playoff game at Tim Hortons Field has sold out of seated tickets. Ticats face Edmonton on Sunday at 1 p.m. ET.

A limited number of standing room tickets remain, and they can be purchased by calling the Ticats office at 905-547-2287 or emailing tickets@ticats.ca.

The Tiger-Cats are inviting fans to come to the game in all black everything — from boots to toque to mittens. Fans should be in their seats by 12:45 p.m.

"Last year's <a href="https://twitter.com/hashtag/PlayoffBlackout?src=hash&ref_src=twsrc%5Etfw">#PlayoffBlackout</a> was one of the coolest atmospheres I've been in." - <a href="https://twitter.com/daneevans9?ref_src=twsrc%5Etfw">@daneevans9</a> <a href="https://twitter.com/hashtag/WearBlack?src=hash&ref_src=twsrc%5Etfw">#WearBlack</a> | <a href="https://twitter.com/hashtag/Ticats?src=hash&ref_src=twsrc%5Etfw">#Ticats</a> | <a href="https://twitter.com/hashtag/GCPlayoffs?src=hash&ref_src=twsrc%5Etfw">#GCPlayoffs</a> <a href="https://t.co/lAeM0kGvXL">pic.twitter.com/lAeM0kGvXL</a> —@Ticats

Hamilton Tiger-Cats have played in the East final five times in the past seven years, and head into the game with a CFL best 15-3.

A Ticats win means they'll play either the Winnipeg Blue Bombers or Saskatchewan Roughriders for the Grey Cup on Nov. 24.

Tiger-Cats last won the Grey Cup in 1999.