Sunday's Pride march flowed through New York City as millions were expected to be in attendance over the weekend, showing pride and support for gays, lesbians, transgender people and others.

This year, the 50th annual Heritage of Pride March coincided with the international Stonewall 50 Rally and WorldPride. New York Police Department officials said in advance of the event that 3 million to 4 million people were expected in the city between June 22 and July 6.

"This year, NYC is hosting the largest Pride celebration in the world," said Pride March Director Julian Sanjivan in a statement, praising NYPD's role in keeping parade-goers and other attendees safe "while they discover their millions of moments of pride."

The NYPD told TheStreet it did not provide crowd estimates, so an official tally was not obtainable by Sunday afternoon.

The events drew many big-name sponsorships, however, with T-Mobile (TMUS) - Get Report , and MasterCard (MA) - Get Report supporting the Stonewall 50 Rally and WorldPride as main contributors, and Macy's (M) - Get Report , Delta (DAL) - Get Report , Hyatt (H) - Get Report and Target (TGT) - Get Report among other top-sponsors.

Bank HSBC (HSBC) - Get Report was among the sponsors who posted their message of solidarity on Twitter by Sunday afternoon.

The events are expected to bring parades, festivals, and other activities through July 6.

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