Matthew Williamson is an English fashion designer. His collections are shown twice a year during New York Fashion Week, and they often have an Indian influence, perhaps related to the time Williamson spent working in India for the clothing store Monsoon.

He counts celebrities such as Cat Deeley, Sienna Miller, Kelis, Jade Jagger and Plum Sykes amongst his friends, but has often been criticised by others in the fashion industry for using them to promote his designs.