R. Madhavan (born 1 June 1970) is an Indian actor, writer and film producer who predominantly appears in Tamil and Hindi language films. He has also acted in a few Telugu and English language films. He has received four Filmfare Awards and an award from the Tamil Nadu State Film Awards along with recognition and nominations from other organisations. He has been described as one of the few actors in India who is able to achieve pan-Indian appeal, having appeared in films from seven different languages. In addition to his acting career, Madhavan has worked as a writer on his films, hosted television programmes and has been a prominent celebrity endorser for brands and products. He has also worked as a film producer, first making Evano Oruvan with Leukos Films, before setting up Tricolour Films to produce Saala Khadoos (2016). Madhavan is noted for his philanthropic activities and promotes various causes such as environment, health and education. He is particularly vocal about the protection of animals and was awarded PETA's Person of the Year recognition in 2011.

Madhavan began his acting career with television guest appearances, including a role on the Zee TV prime-time soap opera Banegi Apni Baat in 1994. After appearing in commercials and in small roles, he later gained recognition in the Tamil film industry through Mani Ratnam's successful romance film Alaipayuthey (2000). In the mid-2000s, Madhavan also actively pursued a career in Hindi films, by appearing in supporting roles in three highly successful productions, Rakeysh Omprakash Mehra's Rang De Basanti (2006), Mani Ratnam's biopic Guru (2007) and Rajkumar Hirani's 3 Idiots (2009), which went on to become the highest grossing Indian film of all time upon release. He simultaneously worked on Tamil films, gaining critical acclaim for his portrayal of a vigilante in his home production Evano Oruvan (2007) and for the successful bilingual horror film, Yavarum Nalam (2009). After appearing in further box office hits, Tanu Weds Manu (2011) and Vettai (2012), Madhavan took a break from acting. Returning after a three-year sabbatical in 2015, his comeback films, the romantic-comedy Tanu Weds Manu Returns (2015), the bilingual sports drama Irudhi Suttru (2016) and the crime film Vikram Vedha (2017) all won critical and commercial acclaim. His performance as a boorish boxing coach in Irudhi Suttru fetched him Best Actor awards at the Filmfare, IIFA and SIIMA award ceremonies.