Nicholai "Nicky" Olivia Hilton is an American fashion model, socialite, and fashion designer. Hilton is also an heiress to a part of the Hilton Hotel chain, as well as to about 5%-15% of her father's real estate fortune and investments. She shares her nickname with her grandfather's brother, Conrad "Nicky" Hilton, who died 14 years before she was born.