Nicholai Olivia Hilton (born October 5, 1983) is an American heiress of the Hilton Hotel chain and model.

She was the second of four children born to Richard Hilton and Kathy Richards. Her sister and brothers are Paris Hilton, Barron Hilton and Conrad Hilton. Her paternal grandparents are Barron Hilton and Marilyn Hawley. She shares her nickname with her grandfather's brother Conrad "Nicky" Hilton, who died 14 years before she was born. The current net worth of Barron Hilton is estimated at just over 1,000,000,000 USD, of which Nicky is expected to inherit around $50,000,000 USD.