The Under Siege star has been a fully commissioned deputy at the state's Jefferson Parish Sheriff's Office for the last 20 years.

As well as going out on patrol, Seagal is said to be an expert marksman, working with the force's SWAT team, and has instructed officers in firearms and hand-to-hand combat.

The new show, which has been commissioned by America's A&E network, will be titled Steven Seagal: Lawman and will follow the actor as he fights crime in Louisiana.

And Seagal is delighted that the public will be able to see the reality of his life away from showbusiness.

He says, "I believe it's important to show the nation all the positive work being accomplished here in Louisiana - to see the passion and commitment that comes from the Jefferson Parish Sheriff's Office in this post-Katrina environment."