From boyfriend jeans to the occasional sheath dress, Katie Holmes's style is, on average, pretty tame, if not tomboy. But on the set of her new movie in NYC, the star took her look in a totally different direction with a strapless denim Topshop dress not much bigger than most jean cutoffs. Sure, it's a costume, but the denim look caught our eye for two big reasons: it's actually pretty on trend at the moment, thanks to the resurgence of all things jean, and it doesn't offer much more coverage than a swimsuit, really. So, could Katie inadvertently be starting a trend? Is this the first of many teeny, tiny denim dresses to come? Scroll through and be the judge.