No Mercy is a 2010 South Korean action thriller film written and directed by Kim Hyeong-jun. Sol Kyung-gu won Best Actor at the 18th Chunsa Film Art Awards for his performance.

Sol Kyung-gu is a South Korean actor. Sol studied Theater and Film at Hanyang University. Upon his graduation in 1994, he appeared in numerous theatrical productions, such as the hit Korean adaptation of the German rock musical Subway Line 1, and productions of Sam Shepard's True West and A. R. Gurney's Love Letters.