Career: Seagal worked as a martial arts supervisor on several films before making his leading man debut in 1988's Nico, aka Above the Law, and followed it up with a string of relatively low-budget action thrillers, including Hard to Kill, Marked for Death and Out for Justice. In 1992, Under Siege became one of his biggest hits, and gave him enough authority to star in and direct 1994 thriller, On Deadly Ground. Despite being savaged by the critics, he pressed on with Under Siege 2, Executive Decision, The Glimmer Man, The Patriot, Exit Wounds and Half Past Dead. An accomplished musician, he's a member of the band Thunderbox and can be seen in reality show Steven Seagal: Lawman as a real-life deputy sheriff. After a number of direct-to-video releases, he returned to the big screen in 2010 with the film Machete.

Career: Messner made his screen debut in 1998 in the US soap Guiding Light, and has worked consistently since. His movie credits include The Sweetest Thing, Spartan, and Anacondas: The Hunt for the Blood Orchid, as well as appearances alongside Bruce Willis in Tears of the Sun, The Whole Ten Yards and Hostage. He has guest starred in CSI: Crime Scene Investigation, Friends, Angel and The OC, before landing the leading role in detective drama Killer Instinct.