The Hottie and the Nottie was shot for 21 days in LA, in early 2007. In an interview, Paris Hilton said that overall, it took two months to shoot the movie. It was also filmed in Malibu.
Originally, the movie was set to be filmed in Boston, instead of in LA. However, Paris, who was one of the exclusive producers, insisted that LA was a better choice because of its warm weather and beautiful beaches.
The location was the only major significant change that was made to the script.