The Boston Police Department says Saturday’s parade in honor of the Stanley Cup champion Bruins is the largest championship parade in city history.

Over one million fans have filled the streets from TD Garden to Copley Square as the players ride Duck Boats through the city. The parade began with a small rally reportedly attended by only about 1,000 people, but it has grown considerably along the route.

The great weather, the fact that this parade is being held on a Saturday, and general excitement for the team’s first Cup in 39 years are all possible reasons for the huge crowd.

Fans who can’t attend can watch live video of the rally.