Vanity Fair's seventh annual Style Issue is so packed with fashionable faces that we had a terrible time narrowing it down to just one for our cover. So we didn't! In a rare treat for V.F. readers, there will be two different images gracing the front of our September issue. Subscribers will be greeted at their mailboxes by Jessica Chastain, the Oscar-nominated star of The Help, Tree of Life, and The Debt. Chastain made the list by virtue of her understated elegance—on the red carpet, she's made nary a misstep, favoring designers like Zac Posen, Elie Saab, and Gucci. On the newsstand, readers will find the Duchess of Cambridge (the princess formerly known as Kate Middleton) beaming up at them. With a face and figure that launched a thousand designer knockoffs, Duchess Catherine is a one-woman style force. Both are banner members of this year's International Best-Dressed List, which also features Jay-Z, Diane Kruger, Matt Lauer, and fellow royal Prince Harry.