‘Percocet Princess’ warned Robert de Niro’s grandson: cops

The so-called “Percocet Princess” who allegedly sold Robert De Niro’s grandson drugs that led to his suspected overdose warned, “I don’t wanna kill u” — before hawking him the fentanyl-laced pills, law enforcement sources said Friday.

Sophia Haley Marks, 20, was held without bail on federal narcotics charges in Manhattan Friday after allegedly selling fake Oxycodone and Xanax to Leandro De Niro Rodriguez, 19, the night before he was found dead, according to a criminal indictment.

Rodriguez first texted Marks on June 30, asking to buy “thirties” —  blue counterfeit Oxycodone stamped with the number — and she allegedly replied that they were potentially dangerous, the sources said.

“Do you really need them?” Marks replied, according to the criminal complaint. “I [don’t] wanna kill u.”

“I don’t like serving you cause they’re not ‘script,” meaning not prescription-grade, she allegedly added.

Rodriguez then asked whether the pills were cut with “fent or h,” a reference to fentanyl or heroin — and she allegedly agreed to sell him three “pressed” Oxycodone pills and two Xanax pills for $105, the sources said.

Marks, who is known on the street as the “Percocet Princess,” allegedly sent the pills to Rodriguez via car service at around 9:30 p.m on July 1, law enforcement sources said.

She then followed up with him via text at 2 a.m., asking if he was doing ok — but he never responded.

Rodriguez was found dead of a suspected overdose in his Financial District apartment on July 2, according to police.

After the tragedy, police say Marks allegedly sold a total of 50 more of the painkillers to undercover officers for $1,000.

During one of the deals, she allegedly told the officer a 19-year-old friend of hers had died after taking one of the pills on June 14 — weeks before Rodriguez’s apparent overdose.

Officers allegedly found 156 pills and $1,500 in cash when they arrested her Thursday evening.

On Friday, Marks appeared in Manhattan federal court on three counts of  narcotics distribution and was held without bail.

She appeared thin, pale and stone-faced in a black T-shirt as she said only “good afternoon” to the judge.

She then answered “yes” to a series of questions including whether she understood the charges.

She is due back in court on Aug. 14.