The 23-year-old British royal looked chic in navy blue dress, black tights and stiletto heels and added a pop of colour with pink lipstick.
Eugenie, who is currently working in New York as a benefit auctions manager at auction house Paddle8, was joined on the front row by Katherine Keating, whose father is Australia's former Prime Minister Paul Keating.
CLICK ON PHOTOS FOR FULL GALLERY
Political journalist Katherine works in the Big Apple hosting the 'One On One' interview series for The Huffington Post and as a contributing editor to The World Post.
Eugenie's appearance at New York Fashion Weeks comes just days after she showed her support at amfAR's star-studded gala.
Prince Andrew's younger daughter was a vision in green at the soiree which was held at New York's event space Cirpriani Wall Street. Her block colour dress was cinched in at the waist by a thin silver belt, and she accesorised with a bronze-hued bag and shoes.
Eugenie and Katherine Keating (left)
Joining Eugenie in showing support for the Foundation of AIDS research were a host of famous faces. Among them were mother-and-daughter acting team Vanessa Redgrave and Joely Richardson, who were honoured at the party.
Since arriving in New York, the Princess has rapidly become a regular on the city's vibrant social scene.
The British royal, who has been living stateside since the summer of last year, is said to be enjoying her job at Paddle8.
While Eugenie was only meant to stay for a three-month placement, the granddaughter of the Queen landed a permanent role at Christmas after impressing her bosses.
Based in a stylish apartment in the trendy Meatpacking district, Eugenie is said to be "making the most" of her time in the city.