Cubs fans show their appreciation to Theo Epstein by chanting his name as he rides a bus holding the Commissioner's Trophy. (0:47)

Fans chant 'Theo' as Epstein passes by with trophy (0:47)

Chicago has waited 108 years to celebrate a Cubs World Series championship. Two million fans are expected to watch as the Cubs depart from Wrigley Field to take a victory lap around the city, ending in a rally in Grant Park.

Scenes from the parade route:

We're glad a few of you could come over today. #FlyTheW pic.twitter.com/0lA7D1AwzY — Chicago Cubs (@Cubs) November 4, 2016

Mile after mile of the Best fans on the planet!! Most amazing thing I've ever seen!@Cubs pic.twitter.com/FN1c0yHSEr — Kerry Wood (@KerryWood) November 4, 2016

#cubsparade Joe Maddon and the team going through Wrigleyville and heading downtown... pic.twitter.com/MLE4vhPscL — Leonor Vivanco (@lvivanco) November 4, 2016

Hey Chicago, what do you say? pic.twitter.com/07WSgXBX3s — Anthony Rizzo (@ARizzo44) November 4, 2016

TJ Reynolds/Special to ESPN

T.J. Reynolds/Special to ESPN

Pre-Parade festivities

Cubs fans were already in place on Michigan Avenue before sunrise, claiming a spot for Friday's championship parade. Bob Holtzman/ESPN

The Chicago River was dyed blue to commemorate the Cubs in advance of the parade. Roman Modrowski/ESPN

Fans began lining the parade route hours before the start of the parade and were 10-deep in places by 9 a.m. ET. Michele Steele/ESPN

Bob Holtzman/ESPN

They did it! #FlyTheW A photo posted by Radim (@czechinchicago) on Nov 4, 2016 at 6:21am PDT

Before the parade had even kicked off, it was clear the Cubs (and their families) were having a good time. Although maybe not Jon Lester, who was less than excited to hold the division series trophy:

Not as exciting holding this anymore! pic.twitter.com/WasRC9w7K0 — Jon Lester (@JLester34) November 4, 2016

Watch SportsCenter's coverage of the parade on ESPN or in the ESPN App.