Riya Sen (; , pron. ) (born Riya Dev Varma on 24 January 1981) is an Indian film actress and model. Riya, who hails from a family of actors including her grandmother Suchitra Sen, mother Moon Moon Sen and sister Raima Sen, began her acting career in 1991 as a child artiste in the film Vishkanya. Her first commercial success in her film career was with Style, a 2001 Hindi low-budget sex comedy directed by N. Chandra. Some of her other films include producer Pritish Nandy's musical film, Jhankaar Beats (2001) in Hinglish, Shaadi No. 1 (2005) Malayalam horror film Ananthabhadram (2005).

Riya was first recognised as a model when she performed in Falguni Pathak's music video Yaad Piya Ki Aane Lagi at the age of sixteen. Since then, she has appeared in music videos, television commercials, fashion shows, and on magazine covers.