Matthew Williamson

Tinged with vibrant Indian-inspired references, Matthew Williamson crafted his 15th anniversary collection to embody three key elements: color, print, and embellishment. With that in mind, Williamson certainly didn't shy away from vibrancy — you'll see everything from beaded prints on leather miniskirts, styled with silky landscape-printed blouses, to orange drip-dye caftan-style dresses punched up with long tasseled necklaces. It may be a Spring assortment of bold pieces, but there's something intrinsically wearable about it, too. The loudness of each dress, cropped trouser, and flowy top doesn't actually overwhelm the style senses like you may think it would. To finish off the parade of color, Williamson sent out a series of showstopping red carpet-worthy gowns — complete with feminine draping, intricate sparkly embellishments, and sexier leg slits.

• Trends: Drip-dye colorways, beaded embellishments, and kaleidoscope prints.
• Colors: Turquoise, fuchsia pink, coral pink, citron, orange, cerulean blue, periwinkle, and nude.
• Key Piece: The lushly printed cropped trousers scream "wear me in the springtime," but we're also obsessed with the floor-grazing gowns that closed the show.
• Accessories: Long tasseled necklaces, beaded belts, ultra-embellished bags, and platform sandals.
• Who Should Wear It: Matthew Williamson has accrued quite the Brit-beauty following, but of the pack, we envision Cat Deeley and Sienna Miller donning these vibrant pieces most. If we're lucky, we'd love to spot Kate Middleton in one of the bold evening gowns, too.

Just days before celebrating her wedding anniversary to Prince William, Kate Middleton showed off her fashion savvy in Spring's hottest trend, wearing not one, but two brilliant peplum looks. Yesterday, Kate wore a dove gray peplum dress adorned with gorgeous beading embellishments by Matthew Williamson, paired with dark green suede pumps and a matching clutch at the UK premiere of African Cats. Kate then switched out of her fancy dress for a prim two-piece tweed suit by Rebecca Taylor for a royal reception at the Goldsmiths Hall in London honoring the Scott-Amundsen Centenary Race to the South Pole. We love how anyone can wear this look just as easily to the office. Meanwhile, blue suede pumps and an Anya Hindmarch snake skin clutch finish off her ensemble. Just click through to see more close-up shots from both of her peplum-fied looks and tell us which is your favorite in the comments section below.

>> From London to Sydney to Miami, this week's best-dressed is a colorful bunch. See who's wearing what — and where — in the slideshow.

Sienna Miller joined the British model Cara Delevingne yesterday to take in Matthew Williamson's London Fashion Week show from the front row. Along with Sienna's mom Jo, the girls also joined Matthew for his afterparty. Model Dree Hemingway got in on the fun too, and they all air-kissed and hugged to the delight of photographers. There were more flashbulbs in store for Sienna today at the Burberry presentation with Rosie Huntington-Whiteley and Ellie Goulding. Tomorrow, she and sister Savannah will show off their latest Twenty8Twelve creations with in-studio appointments. So far, though, it seems Sienna's boyfriend Tom Sturridge is skipping out on the presentations. While all of the excitement is going down, Sienna's also dealing with the ongoing hacking scandal in the UK for Rupert Murdoch's News of the World paper. She was one of the first to have their phones illegally accessed, and despite getting a six-figure settlement, she's still speaking about the painful experience. Sienna said of having her phone hacked, "Stories were coming out that nobody knew about, that nobody except my mother, my sister, my boyfriend and my best friend, and there were times I'd sit down with those four people and accuse one of them of sending stories. And I'd also — terrible — but I'd tell my best friends things and see if they came out and they never did."

Matthew Williamson delivered his signature bohemian glamour for Spring 2012 via lush prints and flowing dresses; he also offered more structured options for the boho-glam working girl. Color was a big story — think tropical island colors like aqua, papaya, sunny yellow, and palm-frond green. But Williamson's fun-loving, gorgeous dresses were styled with structured blazers; a series of silky full-length shirts paired with bright blazers; and there were bold colored trousers mixed with silky blouses. It made for an extremely versatile collection that lost none of that fun sexiness one wants from Williamson. Of course, there were evening options, as well, with swirly beading and feathers galore.

>> After flirting with the idea via collaborations with H&M and Macy's, Matthew Williamson's is finally premiering his first diffusion line, MW Matthew Williamson. The approximately 250-piece collection — which is hitting shop floors now — has an average price point of $400-$560 and a slightly different slant than Williamson's main line. The designer explains: "The main line is known more for print and color and that sort of red-carpet aesthetic, glamour and jet-set and all those kind of ideas. So whilst those ideas have some synthesis within the diffusion line, I wanted to make it more about an urban wardrobe and less about specialty pieces."