Nicholai Olivia Hilton ("Nicky") was born in New York City, into the Hilton family, and has three siblings, older sister Paris Hilton, and younger brothers Barron Hilton and Conrad Hilton. She is the daughter of Kathy Hilton (née Kathleen Elizabeth Avanzino) and businessman Rick Hilton, and a great-granddaughter of hotel magnate Conrad Hilton. She has Italian (from a maternal great-grandfather), Irish, Norwegian, German, English, Scottish, and Welsh ancestry.
As a child, Nicky had a privileged upbringing and moved between several exclusive residences in her youth. She followed her older sister Paris to nightclubs in New York City. She graduated from Convent of the Sacred Heart in 2001 and subsequently attended Parsons School of Design. Afterwards, Nicky worked in designing clothing and handbags.
In 2004, while still 20 years old, Nicky became engaged to a childhood friend named Todd Meister (aka Todd Andrew Meister), a successful businessman who worked on Wall Street. They married in Las Vegas, but the marriage was annulled just one month after Nicky turned 21.
Her 2007 clothing line, "Nicholai", is targeted at older upscale adults. She and her sister, Paris Hilton, were also involved in a September 2010 drug scandal in Japan, where they were denied entrance for a conference to promote products designed by Paris (mainly cosmetics and perfumes).
