She has been the face of Bongo Jeans and Jimmy Choo advertising campaigns .

In April 2007, Richie announced plans to start a jewellery, accessories, and sunglasses line along with a perfume and style book. In October 2008, she debuted a jewelry line, House of Harlow 1960. The line became available at Kitson’s online boutique. In Spring 2010, the line was extended to include apparel and shoes. In 2009, Richie joined maternity store A Pea in the Pod to create the new collection maternity clothes. The line was titled “Nicole”. Richie created pieces that she would love to wear as an expectant mother. In February 2010, Richie expanded her fashion business with a women’s line called Winter Kate, her daughter’s two middle names. The collection was inspired by timeless prints and shapes, beautiful paisley and florals. In 2010, she won “Entrepreneur of the Year” for her House of Harlow 1960 brand at the Glamour Women of the Year Awards
The famous fashion designer has now been awarded as the Style Influencer of the Year 2011 at the Accessories Council Excellence (ACE) Awards. Beginning her career as a reality TV star alongside socialite Paris Hilton in The Simple Life, Nicole is one of numerous television personalities including Lauren Conrad and Whitney Port to venture into the design arena.