First look at the freaky new TV show Westworld

A teaser trailer for the new HBO TV show Westworld is the stuff nightmares are made of.

The clip for the science fiction thriller features Evan Rachel Wood sitting alone in a dark room as a fly crawls across her face.

"Have you ever questioned the nature of your reality?" she's asked.

A scene from the new TV show Westworld.

Set at a futuristic Western-themed amusement park, the show is "a dark odyssey about the dawn of artificial consciousness and the future of sin," says HBO.

The trailer shows snippets of skeletons, gun-wielding outlaws, piano keys moving my themselves and a creepy Anthony Hopkins.

Anthony Hopkins in a scene from the new TV show Westworld.

Also in the cast are Ed Harris, James Marsden and Thandie Newtown.

Inspired by the 1973 movie by the same name, the original series is due for release in 2016.

A scene from the new TV show Westworld.

- AAP