Dylan Perry, 11, killed, Alex Perry, 12, Kyle Pollymore, 5, injured, taken to hospital, after their car, driven by Anthony Pollydore, 65, who was arrested on multiple charges, crashes into a light post on Dean Street and Eastern Parkway in Brooklyn.

The 11-year-old Brooklyn boy who was hurt in a DWI accident has died, a prosecutor said Monday.

Little Dylan Perry succumbed to injuries suffered when his stepfather Anthony Pollydore, 65, crashed into a light post Sunday morning, authorities said.

Pollydore, dressed in a dapper all-white three-piece suit and matching loafers, said nothing when the death of his stepson was announced during his Brooklyn Criminal Court arraignment.

He was ordered held without bail and his license was suspended after getting charged with aggravated vehicular assault and aggravated drunken driving with a child.

Those counts will be upgraded in light of the child's death, a source said.

"He just found out. He's heartbroken," defense lawyer Joseph Ostrowsky said of the tragic loss. "It's just a terrible, terrible thing."

Another 12-year-old stepson, identified as Alex Perry, and Pollymore's son, 5-year-old Kyle Pollymore, were also in the 1995 Toyota during the 8 a.m. wreck in Brownsville.

None of the kids were wearing seat belts, said prosecutor Wilfredo Cotto.

The youngest child was thrown into the front of the car but "didn't have any injuries, which is a miracle," a source said. The 12-year-old had minor injuries to his leg.

But Dylan suffered head and lung trauma and was pronounced dead Monday morning, said the source.

"The defendant was observed by two witnesses driving in a high rate of speed" before hitting a median and crashing head-on into the pole, Cotto said in court.

Pollymore's alcohol blood level was measured at 0.094, well over the legal limit of 0.08, the prosecutor said.

Pollymore has two DWI convictions from 2004 and 2009, he added.

On July 4, 2009, he registered a 0.147 blood alcohol level after being involved in a one-car accident in Queens, according to court documents. He pleaded guilty and paid a $500 fine, records show.

Ostrowsky said after the hearing that he has "unconfirmed information that (my client) was cut off" before the Sunday crash.

He said Pollymore, of Bed-Stuy, was returning from a social gathering, describing him as a war veteran and "a very nice gentleman."