For just one day, Christine Quinn wasn’t the speaker — she was the bride.

Quinn tied the knot with her longtime partner, Kim Catullo, last night in a lavish, private affair just 10 days after President Obama announced his support for gay marriage. It was the city’s highest-profile same-sex nuptials since they were legalized in the state last year.

The speaker, 45, a likely candidate in next year’s mayoral race, wed corporate lawyer Catullo, 45, in Chelsea before a megawatt gallery of political superstars, ranging from Mayor Bloomberg to Gov. Cuomo.

Quinn walked down the aisle in a cream-colored gown designed by New York-based Carolina Herrera, with a one-of-a-kind decorative hair comb by Lulu Frost, fashioned out of family heirlooms. Catullo wore a silk suit designed by Bronx native Ralph Lauren.

Both women, whose moms died of cancer when they were teens, were escorted down the aisle by their tough-as-nails, blue-collar dads, both World War II veterans, Lawrence Quinn, 85, and Anthony Catullo, 86.

Kim Catullo strode in to Bruce Springsteen’s “If I Should Fall Behind” followed by Christine Quinn, who entered to Beyoncé’s version of “Ave Maria.”

The bridal party walked in to a mix version of “Over the Rainbow”/“What a Wonderful World” by the late Hawaiian singer Israel Kamakawiwo’ole.

Before 275 guests that included Sens. Kirsten Gillibrand and Charles Schumer and at least 10 City Council members, the couple exchanged platinum wedding bands and eternity bands from Doyle & Doyle.

“I just wish both women an enormous life of happiness together,” Gillibrand said. “They’re incredibly loving — they compliment each other.”

Other guests included NYPD Commissioner Ray Kelly and Rep. Charlie Rangel, who arrived riding shotgun with Councilwoman Inez Dickens in a red Ford Mustang convertible.

In the vows, Quinn said her life before Catullo was in “black and white” but that once she met Catullo they lived in “Technicolor,” the guest said.

Cuomo — who had led the charge to legalize gay marriage in New York — was asked if he felt responsible for the wedding.

“No, only two people are responsible for this day,” he said.

Guests dined on a five-tiered cake created by Catullo’s college roommate, New Jersey baker Lisa Porada, which featured layers of chocolate chips, chocolate custard and chocolate butter cream — the couple’s favorites.

Additional reporting by Sally Goldenberg