And, luckily, the two won't just be there to smile for the flashbulbs from the comfort of the red carpet; they'll actually be mingling with the customers!
From 7pm - 8pm ET at the Dior flagship on 57th street in NYC, Theron is slated to sign copies of her mug on the September issue of Vogue, while Elgort will be shooting (and signing) portraits of Dior shoppers who drop $2,500 or more during the evening.
And there's more: those lucky high-spenders will not only get a DiorShow makeup session with Ricky Wilson (he's done the faces of Leighton Meester and Sharon Stone), but Vogue stylist Sally Lyndley will also be on hand to help outfit them in the hottest Dior clothing and accessories.
So, basically, if you've got $2,500 bucks to spend, this might be the time and the place to do so. Or at one of the other countless Fashion's Night Out events.
In the meantime, check out what Elgort has been up to, and take a peek at Theron's South West Vogue photo shoot.