The Boston Public Library is flying its rainbow flags for the 2019 Pride Parade.
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Volunteers for the 2019 Pride Parade blow up balloons in Copley Square.
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Mark Garfinkel
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Denton County DA
Another volunteer helps blow up balloons in Boston's Copley Square.
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Mark Garfinkel
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Mezcalent
A balloon rainbow is set up in Boston's Copley Square.
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Volunteers for the 2019 Pride Parade arrive at the check in tent in Copley Square Saturday morning.
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A duck boat decorated in the NBC10 Boston, Telemundo and necn logos sits outside of the Boston Public Library ahead of the Pride Parade.
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Boston prepares for the 2019 Pride Parade.
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A rainbow flag flies next to a Boston Bruins flag in City Hall Plaza.
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Authorities have posted "no parking" and "no stopping" signs across the city ahead of the Pride Parade.
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Martha Plaza, the Boston Pride Parade chair, talks about new features in this year's parade and security measures being taken by participants and authorities.
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Getty Images
A person draped in a rainbow flag in Boston.