Justin Timberlake and Amanda Seyfried star in the In Time trailer

The first trailer for sci-fi thriller In Time has landed online.

Andrew Niccol ( Gattaca ) directs, with Justin Timberlake, Amanda Seyfried, Cillian Murphy and Alex Pettyfer starring.

If you're wondering why the cast is rammed with youthful, easy-on-the-eye talent, it's because the film is set in a future in which time has replaced money as currency.

The characters (who are only given a year's worth of currency when they hit 25) have a handy digital countdown on their forearm to remind them how much time they've got left, as they spend valuable minutes on everyday goods and services.

It's a curiosity-inspiring premise, but as with all high-concept sci-fi there's the chance this could err on the side of silly. As Niccol was able to keep Gattaca compelling, we're willing to take a leap of faith with this one.

This extended trailer (it runs at almost four minutes) sees JT's Will Salas struggling to keep his counter going until he bumps into a mysterious stranger. Being a lengthy promo, the footage does seem to give a fair amount of the plot away.

Take a gander at the trailer below:

In Time will open on 1 November 2011.

Matt Maytum is the former Editor of Total Film magazine. Over the past decade, Matt has worked in various roles for TF online and in print, including at GamesRadar+. Bucket-list-ticking career highlights have included reporting from the set of Tenet and Avengers: Infinity War, as well as covering Comic-Con, TIFF and the Sundance Film Festival.