Silk, a remarkable biopolymer that boasts a wide range of application in various sectors like textiles and pharmaceuticals, has gained significant attention in recent years for its potential in the cosmetic industry and this is attributed by the versatile nature of silk proteins. The possibilities that silk offers for cosmetic applications are examined in this chapter, along with the fibre’s structural details, constituent proteins (fibroin and sericin), and the potential cosmetic advantages of using silk proteins. The commercial availability of products made from silk is also addressed, emphasizing the extent of the utilization of silk as an adaptable and powerful element in the cosmetics sector. A SWOT analysis of the cosmetic application of silk biopolymers is presented, serving as a comprehensive tool that assists companies in optimizing the possible advantages of silk biopolymers while tackling its drawbacks and difficulties in the cosmetic sector. In order to foster innovation, satisfy consumer demand and advance sustainability and health in the cosmetics sector, it is imperative that researchers examine the cosmetic uses of silk and silk proteins.