A drunken driver smashed into another vehicle in Brooklyn on Monday night, critically injuring a 1-year-old boy, according to cops.

Natalie Leonard, 28, was driving a black sedan north on Mother Gaston Boulevard in Brownsville when she crashed into a red 2018 Acura at the intersection of Dumont Avenue around 7 p.m., police said.

The toddler was being held in the lap of a 21-year-old woman in the passenger seat of the Acura, cops said. The passenger was not wearing a seatbelt at the time, police said.

The 1-year-old was rushed to Kings County Hospital in critical condition. The 21-year-old woman was taken to Brookdale Hospital in stable condition.

Leonard was in Kings County Hospital in stable condition.

The 38-year-old driver of the Acura was not injured.

Leonard was arrested and charged with reckless endangerment, vehicular assault, acting in a manner injurious to a child, driving while intoxicated and several other traffic violations.