Nithiin (born Nithin Kumar Reddy) is an Indian film actor and producer known for his works predominantly in Telugu cinema. Nithin Reddy was born to noted film producer Sudhakar Reddy, and Vindhya Reddy. He has an elder sister Nikitha Reddy. Nitin started his career with the movie Jayam in 2002 directed by Teja. He acted in the film Dil directed by V.V. Vinayak. This film is produced by Raju who got the title "Dil raju" after this film. Later in the same year Nithiin acted in the film Sambaram directed by Teja. In 2004, Nitin starred in Sri Anjaneyam directed by Krishna vamsi. Nithiin later acted in the film Sye directed by S.S. Rajamouli's in the same year which stood a block buster at the Tollywood box office.

In 2012 he acted in the film Ishq, Gunde Jaari Gallanthayyinde (2013) Chinnadana Nee Kosam directed by purijaganath, Heart attack directed by Puri jaganath, Courier Boy Kalyan (2015) produced by Gautham Menon. Nithiin acted in the film A Aa in 2016 written and directed by Trivikram Srinivas The film became a biggest grosser in Nithin's career. Nithiin produced the films Gunde Jaari Gallanthayyinde and Chinnadana Nee Kosam, The film Akhil: The Power of Jua (2015)

He won Filmfare Best Male Debut (South) for Jayam (2002) and Santosham Film Awards as Young best performer for the movies Sri Anjaneyam and Sye (2004).