The state’s best and brightest political stars descended on Park Slope Sunday for the swearing-in ceremony of Councilman Brad Lander.

Lander replaces new Public Advocate Bill de Blasio in the 39th Council District, which covers a diverse swath of Brooklyn from Cobble Hill to Borough Park.

In remarks at a spirited January 17th inauguration at the Prospect Park Picnic House, Senator Charles Schumer, several members of Congress, and top city officials recalled Lander’s already significant impact on the district and hailed him as a valuable addition to the City Council.

The program’s length spoke to the many relationships Lander forged during his years leading the Fifth Avenue Committee and the Pratt Center for Community Development.

Schumer called Lander a “perfect fit” for the district, saying he “is going to be an amazing addition to the City Council.”

Representative Nydia Velazquez said Lander would continue fighting for affordable housing, while Representative Jerrold Nadler noted that of the 12 council races in his congressional district last year, Lander was the only candidate out of dozens whom he chose to endorse.

De Blasio, who represented the 39th District from 2001 to 2008, credited Lander for helping revitalize a district of roughly 150,000 “of the most energetic, activist, and some would say opinionated people in all of New York.”

After being sworn-in alongside his family, Lander delivered an address identifying many of the challenges Brooklyn and the city face in the years ahead: recovering from the recession, an affordable housing crisis, and the growing gap between rich and poor.

Lander said he would make “confronting deep inequality” a priority as he looks to foster affordable housing growth and higher-paying jobs.

“We truly need a new model of growth,” said Lander, who noted he will face tough negotiations over controversial issues he supports, like congestion pricing and full civil rights for members of the LGBT community. “I pledge [to fight] for that kind of economic recovery to the best of my ability.”