It was never wise to walk around in the Wild West unarmed.

So there is little wonder Luke Hemsworth was spotted packing a pistol as he filmed scenes for Westworld in Los Angeles on Wednesday.

The Aussie hunk looked prepared for a high noon showdown as he prepared to film sequences with co-star Jeffrey Wright.

In a black mood: Luke Hemsworth was looking literally hot as he filmed Westworld in scorching Los Angeles on Wednesday

The 36-year-old was surely sweating in the scorching heat in his heavy black jacket, trousers and boots as he wandered around the set.

Of course Luke's lack of cowboy garb was understandable, as his character Ashley Stubbs is the head of Westworld security, though with rampaging robots on the loose he will surely get to partake in his fair share of shootouts.

He was joined on set by Jeffrey, who plays the head of the Westworld Programming Division, which has gone off the rails of late in the show.

The second season of the hit HBO show, which is set in a technologically advanced Wild West–themed amusement park, is slated to hit screens sometime next year.

But Luke no doubt always has one eye slightly askew when he sits in the makeup department chair.

Sidekick: He was filming scenes with Jeffrey Wright, who plays the head of the Westworld Programming Division

It's a buggy's life: At one point Luke was wandering around his on-screen transportation

Luke who's sweating: Thankfully he is used to heat after growing up in Australia

For he recently revealed there could be dire consequences whenever he or siblings Chris or Liam where caught indulging in personal grooming

He said: 'If we did [primp], we did it discreetly.

'If any one of us ever spent any length of time in front of a mirror then he would get absolutely hammered by the other two.'

And he said the Hemsworth boys loved nothing more than a bit of rough and tumble in their younger years.

He said: 'We were never really intentionally hurting each other but our games would be physical and usually involve swords and pieces of wood.'