Former Secretary of State Hillary Rodham Clinton will host a fundraiser for New York City mayoral candidate Bill de Blasio.
Clinton and her husband, former President Bill Clinton, endorsed the Democratic nominee last week.
De Blasio managed Clinton's successful 2000 bid for the U.S. Senate and worked in Bill Clinton's administration.
The de Blasio campaign announced that the fundraiser will be held next month but provided no other details.
De Blasio is facing Republican nominee Joe Lhota and independents in the Nov. 5 general election.
Many leading Democrats have asked Clinton, a potential 2016 presidential candidate, to host fundraisers this election season.
She has largely declined. She is hosting two for her longtime friend, Virginia governor candidate Terry McAuliffe, in the next few weeks.