Theeradha Vilaiyattu Pillai (transl. The Insatiable Playboy) is a 2010 Indian Tamil-language romantic action comedy film written and directed by Thiru. The film was produced by Vikram Krishna. Starring Vishal in the lead role along with Sarah-Jane Dias who makes her acting debut. while, Tanushree Dutta and Neetu Chandra making her debut in Tamil cinema Santhanam, Sathyan, Mayilsamy, and T. S. B. K. Mouli play supporting roles, while Sneha and Mallika Kapoor make special appearances and Prakash Raj in a guest role. The film was later dubbed into Telugu as Khiladi in 2012 and later in Hindi as Ek Khiladi 3 Haseenayein.

The film follows the story of Karthik (Vishal), a happy-go-lucky youth and only child, who is also rich and spoilt. Karthik believes in trying out and choosing the best of everything in his life. When he decides to adopt the same practice in choosing his wife and selects three potential candidates of totally different shades and social stratifications, who he simultaneously woos, problems emerge and he gets into trouble. How he manages to overcome all problems and who he finally chooses to marry forms the crux of the story.

The film, featuring music scored by Yuvan Shankar Raja, cinematography by Arvind Krishna and editing by T. S. Suresh, was distributed by Sun Pictures on 12 February 2010.

The film was an inspiration for the 2019 Odia film Mr. Majnu starring Babushan. The background music was adapted from Rajinikanth's Netrikkann.