Part of Yonge Street was shut down for pre-game celebrations including concerts, prizes and giveaways.
Thousands filled the streets, many sporting the team's blue and white colours.
But to see the game up close could cost a lot.
According to TiqIQ, resale Leafs tickets are the most expensive in the NHL with the median price running over $400 — almost double league median which is around $180.
And the crowds are also inside as sports bars near the Air Canada Centre began filling up early in the day with people hoping to hold onto a seat to watch the game.
Watch Natalie Kalata's story above for more on Leafs hockey fans.