Nicholai "Nicky" Olivia Hilton (born October 5, 1983 in New York City, New York, USA) is an American fashion model, socialite, and fashion designer. She shares her nickname with her grandfather's brother, Conrad "Nicky" Hilton, who died 14 years before she was born.
Nicky is the second of four children born to Richard Hilton and Kathy Richards. Her sister is Paris Hilton, and her brothers are Barron Nicholas Hilton and Conrad Hughes Hilton. On the maternal side of her family, Nicky is a niece of two popular child stars of the 1970s, Kim Richards and Kyle Richards, who appeared in the motion picture Escape to Witch Mountain and TV shows like Nanny and the Professor, Little House on the Prairie, and later, ER. Her paternal grandparents are Barron Hilton and Marilyn Hawley.
Hilton moved between several homes in her youth, including a suite in the Waldorf-Astoria Hotel in Manhattan, Beverly Hills, and The Hamptons on Long Island, New York. She graduated high school from the Convent of the Sacred Heart in New York and attended college at the Fashion Institute of Technology and Parsons School of Design, but did not finish her fashion degree.