Kanthaswamy is a 2009 Indian Tamil-language vigilante action film directed by Susi Ganesan. The film stars Vikram as the titular character, with Prabhu, Shriya Saran, Ashish Vidyarthi, Mukesh Tiwari, Krishna and Vadivelu appearing in supporting roles. The film was mostly dubbed in Telugu as Mallanna with Vadivelu's scenes partially reshot with Brahmanandam. The film's soundtrack and background score were composed by Devi Sri Prasad.

The film was released on 21 August 2009 and received positive reviews and became a success at the box office. It was remade in Bangladesh as Most Welcome, starring Ananta Jalil and Barsha.