>> Official government parties might not be the first place to look for style inspiration, but Michelle Obama, Anna Wintour, and the other women who attended the White House's state dinner for British Prime Minister David Cameron looked ultra chic last night.
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To wit: the first lady dressed up in a deep blue custom Marchesa gown — and she thanked the fashion house by way of inviting designer Georgina Chapman, who wore a sparkly pale blue dress of her own design. Meanwhile, Samantha Cameron wore a stunning lace-covered dress by British designer Alessandra Rich, and Wintour brought the Chanel couture dress she wore to the 2009 Met Gala out of her closet for the occasion. Downton Abbey's Elizabeth McGovern and PBS reporter Gwen Ifill also got glammed up — stroll through the slideshow to see what they wore.
Michelle Obama Plays Tennis in L'Wren Scott, New Blood at Dior

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>> Those stories and more in our daily news roundup.
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First Ladies of Style Unite: Michelle Obama Hosts the UK's Samantha Cameron
It's all about the Brit love, as Barack and Michelle Obama are currently hosting a three-day visit of the UK Prime Minister David Cameron and his wife Samantha at the White House. And it's a very fashionable world leader meet up, with our own first lady style icon Michelle spending time with chic Samantha Cameron, who actually hails from a fashion background. And while the president and prime minister discuss the Middle East, their wives have been getting chummy at a middle school, participating in an Olympics-themed Let's Move! event with school kids ahead of the 2012 London Summer Olympics. Even though David technically isn't the "head of state," there will still be a state dinner tonight — and we can't wait to see Michelle and Samantha in their gowns! See first ladies of fashion enjoying themselves in DC.
Samantha Cameron at the Royal Wedding: Love It or Leave It?
The wife of UK's prime minister, Samantha Cameron, looked lovely this morning as she made her way into the abbey in a green suit with a gold and red beaded necklace and a feathery, sparkle fascinator. Her makeup is simple and polished, typical of the political style we see in Washington DC. What do you think of her hair and makeup look for such a symbolic day?

What Victoria Beckham and Other Fashion Industry Guests (Plus Chelsy Davy) Are Wearing to the Royal Wedding
>> Plenty of talk has been made of Kate Middleton's wedding dress, but what about her wedding guests? Victoria Beckham is said to be wearing one of her own designs — from the Fall 2011 Victoria Beckham collection — paired with custom Christian Louboutin shoes and a Philip Treacy hat.
Alexandra Shulman has gone with Christopher Kane for the big day (who Samantha Cameron is also rumored to have chosen), while Anya Hindmarch picked a "classic and chic" Emilia Wickstead look. Harper's Bazaar's Sara Parker Bowles will wear Osman, while her mother-in-law Camilla, Duchess of Cornwall, will be dressed by Anna Valentine, the designer who created her wedding dress when she married Prince Charles in 2005. And former Armani muse Lady Helen Taylor is wearing Erdem.
Picture It: English Breakfast

An awkward moment we couldn't help but share between French first lady Carla Bruni-Sarkozy and a very pregnant Samantha Cameron, wife of Britain's new prime minister, today in London. The Sarkozys visited London to commemorate the 70th anniversary of President Charles de Gaulle's famous wartime broadcast to Nazi-occupied France, which is believed to have played a vital role in winning World War II.
6 Facts About Britain's New First Lady Samantha Cameron
David Cameron has officially become the new prime minister of Britain, but I'm wondering: who's the new first lady across the pond?
With all of our stylish first ladies already topping best-dressed lists, it seems Samantha Cameron's own fashion credentials will help her fit in just fine with the likes of Michelle Obama and Carla Bruni-Sarkozy. Besides being a mother of three young children with another on the way, she's spent the past 14 years as creative director of luxury leather and personalized stationery firm Smythson, and she's credited with transforming it into a legit designer label. To find out six things you may not know about the new prime minister's better half, read more

