‘Percocet Princess’ Sofia Haley Marks busted in death of Robert de Niro’s grandson has sold to kids as young as 15 years old: cops

The so-called “Percocet Princess” drug dealer busted in connection to the suspected overdose death of Robert de Niro’s grandson has allegedly sold pills to children as young as 15, police said Friday.

Sofia Haley Marks, 20 — who allegedly sold to 19-year-old  Leandro De Niro Rodriguez before he was found dead in his Financial District apartment on July 2 —  is notorious for her crop of under-aged clients, a police source said.

“She sells to kids. She is well known in the drug dealing world,’” the source said, adding she has sold to kids who are barely high school-aged.

“The feds got involved. They had another buy last night. So they were like, ‘Scoop her up now,” the source said.

Marks was arrested in an undercover sting operation conducted by the NYPD, Drug Enforcement Administration and Homeland Security at around 6 p.m. Thursday, law enforcement sources said.

She was charged federally with the distribution of narcotics, and was expected to appear in Manhattan federal court Friday afternoon.

Earlier this month, Rodriguez’s mother, Drena De Niro, announced her son’s death on Instagram — saying “someone sold him fentanyl laced pills” knowingly.

“So for all these people still f–king around selling and buying this s–t, my son is gone forever,” she wrote.

Police are probing the case as an overdose but the city’s medical examiner’s office has yet to reveal a cause of death.

Rodriguez was the son of Drena De Niro, the oldest child of Robert De Niro and his ex-wife Diahnne Abbott.

The “Taxi Driver” star told Page Six he was “deeply distressed” by the death of his “beloved grandson” a day after his body was found.

Like his grandpa, Rodriguez was an actor who had appeared in projects such as Bradley Cooper’s 2018 remake of “A Star is Born.”