Emma Watson's Red Carpet Style

Watson attended the Duke of Cambridge's Royal Marsden dinner at Windsor Castle in England wearing an elegant Ralph Lauren Collection ensemble paired with a Roger Vivier Boite de Nuit clutch.

She chose a Dior top, jean and skirt with Repossi and Eva Fehren jewelry for the Time 100 gala.

Watson, at the Madrid premiere of Regression, opted for a design featuring a black cut-out trim top and tweed printed skirt, complete with a gold cuff and black ankle-strap pumps. 

"It felt a bit different," she told us of her decision to pair pants with her Dior gown and Roger Vivier pumps.

She wore a Balenciaga top and pants when she was honored at BAFTA's Britannia Awards. 

The actress attended the designer's fall 2014 Haute Couture collection in Paris in head-to-toe Dior: a black clutch, white pumps, and a dark navy dress. 

To pick up her British Style Icon Award at the 2014 British Fashion Awards, Watson wore a white, wide-legged jumpsuit from Misha Nonoo. 

Watson attended a gala during Couture Fashion Week in Paris wearing a black Givenchy suit cinched with a patent leather belt. 

"Emma is the definition of elegance in this J. Mendel off-the-shoulder dress," says Gilles Mendel. The silk sheath fit her 5-foot-6 frame perfectly without any alterations, he adds.

In a Peter Pilotto dress and strappy Tabitha Simmons shoes at the People's Choice Awards. 

She chose a feminine lace and silk bow dress that she paired with pointy-toe Christian Louboutins at the BAFTAs. 

She paired her cocktail dress with cigarette pants and a Tiffany & Co. key pendant and Boucheron diamond studs. 

At a Perks of Being a Wallflower fete, the actress chose a bloom-embroidered Erdem design. 

"In this updated little black dress, she looks youthful and modern," says Calvin Klein's Francisco Costa. Black heels (her go-to shoe color), also by the label, complement the minimalist vibe.

Tough? Sweet? Why not both? She demonstrates how in a leather blazer and multi-print skirt and top (all by Miu Miu). "Getting dressed up always lifts my mood," she has said.

The star chooses accessories that keep a look "clean and simple." She lives that mantra in a silk Jason Wu peplum top and bow belt teamed with a Sandro skirt and leopard Charlotte Olympia clutch.

"My pixie has made me braver with my style," she told us. Plus, the cut makes it so much easier to show off the bold one-shoulder design of this beaded Balmain number as well as her gleaming Jennifer Meyer pavé diamond earrings.