S. P. Jananathan was an Indian film director and screenwriter who worked in Tamil cinema.

Iyarkai is a 2003 Indian Tamil-language romantic drama film directed by S. P. Jananathan in his directorial debut. The film stars Shaam and Radhika. Arun Vijay—who at the time was known as Arun Kumar—makes a cameo appearance and Bollywood actor Seema Biswas plays a supporting role. Iyarkai marks the debuts of Radhika and Biswas in Tamil cinema.