Princess Beatrice See All Photos Getty Images

Sizzling and safe, classic and edgy, entrance-making and elegant, the little black dress is the most adaptable weapon in the female arsenal. And Princess Beatrice knows it. The 24-year-old royal reached for an LBD to attend a book launch party in London last night with boyfriend Dave Clark, who works at Sir Richard Branson’s Virgin Galactic space tourism project. She accessorized the look with a studded belt and matching accessories, including a black braided clutch and pumps. What’s the key to a perfect LBD? Says designer Julie Chaiken: “It should be fabulous enough to turn heads in a room and sophisticated enough to take the breath away of someone special.” Did Beatrice’s do the trick? You tell us.

Plus, see more of Princess Beatrice’s outfits.

See the Photos

MORE:
See Kate Middleton’s Best Outfits
Pippa Middleton’s Prettiest Looks
The Look That’s the Beatrice Double-Take