Nicholai Olivia "Nicky" Hilton (born October 5, 1983) is an American businesswoman, fashion model, socialite, celebutante, heiress and fashion designer. She is a great-granddaughter of Conrad Hilton (founder of Hilton Hotels) and younger sister of Paris Hilton.

Hilton was born in New York City, and raised in Los Angeles. She is the second of four children born to Richard, a businessman, and Kathy Hilton (née Avanzino). She has an older sister, Paris, and two younger brothers, Barron Nicholas Hilton II and Conrad Hughes Hilton III. She was raised Catholic; Hilton attended Convent of the Sacred Heart and graduated in 2001.

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