City Council Speaker Christine Quinn and Public Advocate Bill de Blasio picked up key endorsements for their mayoral campaigns Thursday.

Brooklyn Borough President Marty Markowitz backed Quinn at a ceremony outside Borough Hall.

De Blasio said Democracy for NYC, the New York wing of the nonprofit political advocacy group Democracy for America, backed his run for mayor.

Markowitz said fellow Democrat Quinn has demonstrated bipartisan support and a vision that will help improve the city.

"Throughout her career, she has shown she gets the job done," Markowitz said.

More than half of the members of Democracy for NYC, which endorses Democratic candidates in legislative races across the city, voted for a de Blasio endorsement, according to his campaign.

No members of the group, however, voted for Quinn.

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