Asin Thottumkal (born 26 October 1985) known mononymously as Asin, is an Indian film actress, model and stage performer who acts primarily in Bollywood and Kollywood.

Making her acting debut in Sathyan Anthikkad's Malayalam film Narendra Makan Jayakanthan Vaka (2001), Asin had her first commercial success with the Telugu film Amma Nanna O Tamila Ammayi in 2003, and won a Filmfare Best Telugu Actress Award for the film.

After a number of films, she received her second South Filmfare Award for Best Actress for her critically acclaimed performance in her second Tamil film, Ghajini (2005). She played the lead female roles in blockbusters such as the action comedy Varalaru (2006), the action thriller Pokkiri (2007) and the big budget production Dasavathaaram (2008). In late 2008, Asin made her début in Bollywood, with Ghajini, the remake of its Tamil namesake, subsequently winning the Filmfare Best Female Debut Award.