First lady Michelle Obama chose Jason Wu as her designer this year, just as she did in 2009.
The chiffon and velvet gown was complemented with Jimmy Choo shoes and a ring by Kimberly McDonald.
Earlier in the day, the first lady chose a Thom Browne coat and dress for the inauguration.
In addition, she wore a belt from J. Crew and a necklace by Cathy Waterman. She was also wearing J. Crew shoes.
Here's a look at the dress and a Reed Krakoff cardigan, from Monday's luncheon at the U.S. Capitol.
For the Kids Inaugural concert Sunday night, the first lady wore a white Alexander McQueen shirt and black pants.
Sunday evening she wore a black sequined Michael Kors boat neck dress at the National Building Museum.
Here's a photo from The Youth Inaugural Ball in 2009, showing the first Jason Wu dress.
First lady Michelle Obama wearing Tracy Reese at the 2012 Democratic National Convention.
Michelle Obama wears Michael Kors with a vintage Dior gold belt for a dinner with Israeli President Shimon Peres.
Obama wears hipster favorite Band of Outsiders for an interview about the Kitchen Garden.
Michelle Obama wore what has been reported to be a Reed Krakoff dress in blue for the official swearing Sunday in the White House Blue Room.
Michelle Obama works the colorblock trend in a Preen shift dress.
On her way to Easter services, Obama wears a Thakoon dress.
Michelle Obama wears a favorite $35 Jason Wu for Target dress.
Obama wears a cobalt-blue Jason Wu for a dinner for members of the US armed forces who served in Iraq and Afghanistan.
Obama attends a 2011 Kennedy Center Honors reception in a one-shouldered Vera Wang gown.
For a state dinner with the South Korean president, Obama wears Korean designer Doo-ri Chung.
First lady Michelle Obama meets Queen Elizabeth II in a Barbara Tfank dress.
To mark a state dinner for Indian Prime Minister Manmohan Singh, Obama wears Indian designer Naeem Khan.
Michelle Obama causes a huge stir wearing J. Crew for an appearance on 'The Tonight Show with Jay Leno.'
Michelle Obama wears a Target dress both to and from her Christmas vacation in Hawaii.