Vaalu (transl. Tail/Mischief Maker) is a 2015 Indian Tamil-language romantic action comedy film written and directed by debutante Vijay Chandar. The film stars Silambarasan and Hansika Motwani, with Santhanam, VTV Ganesh and Brahmanandam portraying supporting roles. The film was produced by S. S. Chakravarthy under the banner NIC Arts. S. Thaman composed the music while Sakthi and T. S. Suresh handled the cinematography and editing respectively.

The film's production began on 6 June 2012 in Chennai and lasted until June 2015. The film was predominantly shot in Chennai, with the portions of the film also shot at Hyderabad, Bangalore and Bangkok. After facing multiple delays, the film was released worldwide on 14 August 2015. The movie is loosely adapted into the 2016 Kannada film Santhu Straight Forward.