Diana Kurien (born 18 November 1984 in Kerala, India), popularly known as Nayantara (Tamil : நயண்தரா), is a south Indian actress and has acted in Tamil, Telugu and Malayalam movies.

She was born in Tiruvalla, Pathanamthitta District, Kerala. She was chosen by director Satyan Anthikkad and cast opposite Jayaram in Mansinakkare. Later she played a ghost who falls in love with hero Mohanlal in Fazil’s Vismayathumbathu. She played opposite Sarath Kumar in Ayya. She acted with Rajnikanth in Chandramukhi, her most successful movie to-date[

Previously, Nayanthara was frequently linked with Simbhu, who she worked with in Vallavan. At the time, both Simbhu and Nayanthara kept denying this. However on November 17th, 2006, she announced her break-up with co-star Simbhu.