The White House had a sepcial guest today: HRH Prince Harry! Prince Harry joined the First Lady for a White House event to honor military mothers.

On the fashion front, Mrs. O wore a Prabal Gurung Resort 2013 dress, previously seen here.

The First Lady presented the 2013 National Medal for Museum and Library Service to 10 institutions from across the country in a ceremony held in the East Room of the White House on Wednesday. For the event, Mrs. O wore a purple Roksanda Illincic dress, previously seen here and here in 2011.

The First Lady signed copies of her book "American Grown: The Story of the White House Kitchen Garden and Gardens Across America," during a signing event at Politics & Prose in Washington, D.C. on Tuesday. For the event, Mrs. O wore a blue and gold pleated skirt paired with an embellished navy floral top.

For a detail view:

Update: Reader lisam has spotted Mrs. O's top, the Marygrace Sweater by Tory Burch, available here. The bracelets are from Alexis Bittar, part of the designer's Elements Collection.

Mrs. O spoke at the Department of Agriculture in Washington, D.C. on Friday. For the appearance, Mrs. O wore a colorblock Preen Pre-Fall 2012 dress, previously seen here in 2012.

The First Lady spoke about the Joining Forces hiring initiative for military veterans and spouses in an event held in the East Room of the White House on Tuesday.

For the event, Mrs. O wore a Thakoon inside-out dress from the designer's Fall 2008 collection, first seen at a 2008 presidential debate here. Red pointed toe pumps completed the look.

The First Lady spoke at the White House Forum on Military Credentialing and Licensing in Washington, DC on Monday. For the speaking engagement, Mrs. O wore a grey pinstripe suit paired with a purple blouse. The accessory star: Miriam Haskell oxidized silver plated brass earrings with agate crystals and glass.

Tonight marks the annual White House Correspondents' Association Dinner at the Washington Hilton Hotel, hosted by Conan O'Brian. For the formal event, dubbed the "nerd prom" by the media set, Mrs. O chose a black beaded, draped chiffon goddess gown with high neckline in Chantilly lace by designer Monique Lhuillier.

More to follow and happy weekend!

Update: Mrs. O wore earrings from New York-based jewelry designer Catherine Angiel, confirmed by the designer on Twitter here.

The President and First Lady flew to Dallas, Texas today, where they will join former presidents in inaugurating the presidential library and museum of George W. Bush. Arriving at Dallas Love Field Airport, Mrs. O wore a pink draped neck dress (a new frock, perhaps?) paired with a black belt and cropped cardigan. Silver heels completed the look.

Update: At the dedication of the presidential center, Mrs. O re-wore a powder blue Zac Posen suit, previously seen here for the official welcome ceremony for British Prime Minister David Cameron and his wife Samantha Cameron at the White House in March 2012.

While in Texas, the Obamas also attended a memorial for victims of the fertilizer plant explosion in West, Texas held at Baylor University in Waco, Texas.

Mrs. O visited the Department of the Interior yesterday wearing a Jason Wu dress that dates back almost five years, first seen here during a November 2008 interview with Barbara Walters. The dress hails from the designer's Spring 2009 collection, made of ivory raw-silk dress with hand-embroidered rosettes. Several years later, the dress is on-trend with this season's black and white palette. The First Lady embraced other old favorites yesterday, pairing the dress with her famed Alaia belt and a cropped black cardigan. 

The First Lady accompanied the President to Boston this week in the aftermath of the Boston Marathon bombings. For the somber occasion, Mrs. O wore a blue dress and coat, presumably both by Narciso Rodriguez. Mrs. O has worn the Narciso Rodriguez coat a few times before, first in May 2011, here. I believe this is the first time we have seen the dress to match. A belt at the waist and pin at the shoulder completed the look.