A woman has been arrested in connection to the suspected overdose death of Robert De Niro’s 19-year-old grandson, The Post has learned.

The suspect, whose identity is still under wraps, is believed to have sold Leandro De Niro Rodriguez drugs before he was found dead in his Financial District apartment on July 1, law enforcement sources told The Post.

Sources have previously told The Post a white powdery substance and drug paraphernalia were found near the teenager’s body.

Leandro’s mother, who is the Academy Award-winning actor’s eldest daughter with his ex-wife Diahnne Abbott, described her son as a “beautiful sweet angel.”

“I have loved you beyond words or description from the moment I felt you in my belly,” she wrote in her emotional tribute earlier this month.

This is a developing story. Please check back for updates.