Gov. Andrew Cuomo has pledged his “full support” for a statue of Saint Frances Cabrini — in what attendees described as a “slap in the face” to Mayor Bill de Blasio for the controversial snub.

Speaking at Saturday night’s Columbus Citizens Foundation Gala, Cuomo urged the entire Italian-American community to “stand up” in support of the honor — calling it an “affront” that Mother Cabrini was passed over despite coming first in a poll by first lady Chirlane McCray’s “She Built NYC” statue program.

Cuomo suggested that the rejection was emblematic of the “difficult times in this country” with the “pain and the injustice of discrimination.”

“There is a fear, there’s an anxiety, there’s a divisiveness that you see and feel every day,” he said.

“As Italian-Americans, we must also remember that we ourselves are not immune from attack. The ugliness of Italian American stereotyping is still alive and well. Our battle is not over.”

He then brought up the statue scandal, not holding back his anger that seven other New York women were selected for honors despite Cabrini being the “leading vote-getter by far” in a poll of 300 names.

He proudly threw his support behind the Brooklyn Diocese’s plans for its own memorial for her, noting that Brooklyn Bishop Nicholas DiMarzio has called the snub “an affront.”

“They are right. We should applaud their courage and their activism,” he said to loud applause.

“But my friends, we should even do more. We should support them. Let’s join with them tonight. Let’s stand up. Let’s demand respect for our community. Let’s lead the way by taking action and let’s build a memorial to Mother Cabrini – and I pledge my full support tonight,” he continued — without detailing exactly what his support would entail.

His spokesperson later told The Post that governor will “meet with the groups working on this issue and see how we can best help and be supportive.”

Joseph Scelsa, founder and president of the Italian-American Museum who attended the Columbia Citizens dinner, said Cuomo’s pro-Cabrini stand was a “slap in the face” to de Blasio.

“The reaction in the room was tremendous,” Scelsa said, calling de Blasio’s pledge to recommend a statue for Mother Cabrini during the second round of the competition “a dollar short and a day late.”

Cabrini, an Italian immigrant who founded 67 institutions to help the needy, finished first in a citywide poll asking who should get an effigy — but McCray and former Deputy Mayor Alicia Glen nonetheless decided not to grant her the honor.

The incident has riled up Big Apple Italian Americans and Catholics — with sparked actor Chazz Palminteri even calling McCray a “racist” over the move.

The Diocese of Brooklyn also plans to dedicate one of its floats in Monday’s Columbus Day Parade to Cabrini.