When the annual Pride Parade steps off at noon Sunday on the North Side, more than 1 million people are expected to be there, according to organizers.

This is the first Pride Parade since Illinois' law allowing same-sex marriage went into effect. Same-sex marriage will be part of the parade's theme, with married couples featured throughout the procession on floats, in cars and marching with organizations.

The parade has 200 registered entrants, with a handful of new religious groups and organizations, including the Shedd Aquarium and Art Institute of Chicago, organizers said. The parade is expected to last about three hours, but people often remain along the 4-mile route that wraps around Uptown, Lakeview and Lincoln Park for long afterward.

Police warn they will be watching for compliance with rules regarding the number of people on balconies and enforcing the city's zero tolerance ban on alcohol consumption on the public way. This year's parade comes just as the city has increased the fines for public drinking and urinating. The fines are now between $500 to $1,000.

— Tribune staff