A promising young model and fashion designer who dressed Lady Gaga and other celebrities was murdered with a lethal cocktail of fentanyl and other drugs in what may have been a robbery last year, cops and reports said Friday.

Kathryn Marie “Katie” Gallagher, 35, was found dead in the bedroom of her apartment at 139 Eldridge Street on the evening of July 24, 2022, the New York Police Department said.

The NYPD classified her death as a homicide on Friday, after the medical examiner determined that she died from acute intoxication from the combined effects of fentanyl, ethanol and p-fluorofentanyl.

Gallagher may have been the victim of a drug-motivated robbery, NBC reported. 

According to an obituary published by the Rhode Island School of Design, Gallagher’s alma mater, the Pennsylvania native was “a painter and internationally-recognized fashion designer” who opened her eponymous label in 2010.

Over the last decade, her work was featured in magazines such as Vogue, Glamour, and W, and her collections were worn by celebrities like Laverne Cox, Rita Ora, and Lady Gaga

Gallagher is survived by her parents, grandmother, and three sisters, who were “so proud of who she was and all she achieved in her brief but full and beautiful life,” the tribute concluded.

A memorial service for Gallagher was held in Pennsylvania in August, and a celebration of life is scheduled for this May.