A 4-year-old girl was struck and killed by an intoxicated driver outside her Long Island home Tuesday night, authorities said.

Roussy Cabrera Fuentes was mowed down on Fulton Street in Brentwood by the 19-year-old driver of a Honda Civic, Christian Yanes, police said.

The young victim was taken to Southside Hospital in Bay Shore and pronounced dead, according to police.

Yanes, also of Brentwood, was arrested at the scene. He was later charged with driving while ability impaired by drugs, cops said.

He is expected to be arraigned Wednesday.