Details of the event will be announced at a later date, a release from the de Blasio campaign said Thursday.
The former secretary of State and first lady, along with former President Clinton, endorsed de Blasio last week. He's currently the city's public advocate.
President Obama also expressed his support for the candidate at a Democratic fundraiser this week.
De Blasio has known the Clintons for a long time. He was the campaign manager for Hillary ClintonHillary Rodham ClintonDem rep: 'We must pause the entire Trump agenda' until Russia investigation complete New England Patriots to visit White House on April 19 More than ever, Justice must demand a special prosecutor for Trump-Russia probe MORE’s successful Senate campaign in New York in 2000. Under President Clinton, he served as a regional director at the Department of Housing and Urban Development.
De Blasio almost faced a possible run-off, but then second-place winner Thompson conceded and backed de Blasio.
He now faces Republican candidate Joe Lhota in the general election Nov. 5. Recent polls show de Blasio has a hefty lead.
If he wins, he will be the first Democratic mayor of New York City since David Dinkins’s administration from 1990 to 1993.
Republican Rudy Giuliani followed, and current Mayor Mike Bloomberg, originally a Republican, became an independent in 2007. Bloomberg will have served 12 years once he leaves office at the end of the year.