Hilfiger was born in Manhattan, New York, in 1985.

A self-taught artist, Alexandria first started exhibiting her work in New York City, in 2004. As a multi-disciplinary artist she also wrote and produced a television show, produced a feature film, and co-founded the fashion label, NAHM. During this time Alexandria was quietly battling an undiagnosed chronic illness which ultimately forced her close her label and retreat from the public eye. During her eventual treatment and subsequent recovery, Hilfiger reverted back to her original practice of painting. This became integral to her healing process both physically, mentally and spiritually. In 2013 Hilfiger reemerged and began exhibiting work again in such places as Art Basel Miami, Spring Break New York, Robina Benson and Giorgetti.

Using abstract shapes, texture and color, her work explores questions around how one processes the complex and sometimes undefinable realm of human emotions. Taking inspiration from forms found in nature, her paintings attempt to re-contextualize ideas of “imperfection” as aspects of beauty. Hilfiger's work ranges in scale from large, acrylic on canvas paintings, with vibrant colors and broad expressive strokes, to smaller more delicate works on paper, in ink and oil pastel. Alexandria currently works and resides in Los Angeles.