Bill de Blasio sworn in as New York City's new mayor

New York City's new mayor Bill de Blasio (right) signs the oath of office. Credit: REUTERS/Seth Wenig/Pool

New York City has a new mayor after Bill de Blasio was sworn in at a ceremony at his home just after midnight.

The newly sworn-in New York City Mayor Bill de Blasio waves with his wife Chirlane McCray and children Dante and Chiara. Credit: REUTERS/Seth Wenig/Pool

De Blasio's formal inauguration ceremony will take place at on Wednesday at City Hall, where former US President Bill Clinton will administer the oath of office.

Outgoing mayor Michael Bloomberg walks through the crowd outside City Hall as he leaves for last time as Mayor of New York. Credit: REUTERS/Carlo Allegri

Earlier Michael Bloomberg left City Hall for the last time as mayor of New York to applause and cheers.