Watch Scarlett Johansson star in trailer for Luc Besson's Lucy: online now

The trailer for Luc Besson's sci-fi actioner Lucy has hit the 'net, and it's a bit bloody exciting.

It might seem a tiny bit gratuitous in the opening few seconds - we first see Scarlett's Lucy in a bra, and there's a bit too many 'Scarlett being objectified' clips in those opening moments - but then the premise kicks in (Lucy is affected by a drug that allows her to access 100% of her brain's capabilities, instead of the usual 10%) and it starts to get really good.

This one's just gone near the top of our must-watch list, check it out below, then let us know what you think.

Lucy opens on 22 August in the UK