The premier pairing of Brad Pitt and Angelina Jolie is all you'll really want to know about Mr and Mrs Smith. Does their supposed off-screen friction cause the sparks to fly once the cameras are rolling? Well, yes and no. Director Doug Liman manages to build the tension pretty well - presenting the glam couple as sort of an ordinary married pair, going through the sort of problems any ordinary married pair go through. They bicker, they argue, and they go to counselling once the attraction they have had for each other begins to dim.

The joke is that even this dream couple are, after all, just like you or me - if we were incredibly toned, rich and drop-dead gorgeous, of course.

The snickering comes from the fact that they're both hiding one important secret: they're assassins. And their dedication to each other is put to the test once their parallel lives cross paths and they're ordered to kill each other. It's all pretty harmless stuff, and when things get a bit dull there are lots of bangs and explosions. It doesn't hurt that they're both pretty keen to disrobe and show off their considerable wares, either.

But it says something about how confident the filmmakers were in their stars holding our attention that Vince Vaughn is thrown into the equation to add a few laughs. He does - including a few wise-ass nods to the deplorable remake of Psycho that he somehow got caught up in - but makes next to no input as far as the actual story line goes. And the longer the film goes on, the more you wonder if anyone had actually thought the whole thing through. By the end, it runs out of puff. Time and time again, it's left to Jolie and Pitt to cast knowing asides or throw barbs at each other. It all wears a bit thin and rates pretty high on the smug-o-meter. Yes, yes, Angie, we know it's beyond belief that even a man like Brad wouldn't want to be tearing your clothes off every chance he could get. Silly man.

Anyway, there are some good lines and there are certainly worse ways to spend your time than watching these two get it on.

Mr and Mrs Smith opens today