January 21, 2013When Michelle Obama became the latest First Lady of the United States in 2008, she immediately gained the fashion community's vote for her all-American style. Known for wearing the designs of Jason Wu, Isabel Toledo, and Laura Smalls, the role model has undoubtedly helped make these native designers overnight sensations. In honor of her 49th birthday, we take a look back at her best-dressed moments.

January 21, 2013Mrs. Obama joins President Obama to pay their respects at the Martin Luther King, Jr. statue in Washington, D.C., wearing a Thom Browne dress and blue Reed Krakoff cardigan.

January 21, 2013She completes her silk Thom Browne jacquard dress with a J.Crew belt, Cathy Waterman necklace, and Reed Krakoff boots, at the swearing-in ceremony at the US Capitol in Washington, D.C.

November 19, 2012She wears a Zero + Maria Cornejo graphic print dress at an awards ceremony for the President's Committee on the Arts and the Humanities at the White House.

October 16, 2012The First Lady attends the presidential debate at Hofstra University, wearing a tailored fuchsia Michael Kors dress and blazer.

September 6, 2012She is joined by her daughters Sasha and Malia Obama at the Democratic National Convention in Charlotte, North Carolina, outfitted in Tracy Reese.

September 4, 2012The First Lady matches a Tracy Reese dress with J.Crew pumps at the Democratic National Convention in Charlotte, North Carolina.

July 10, 2012Mrs. Obama visits the Barbara Goleman Senior High School in Miami Lakes, Florida in a printed Chris Benz dress.

April 28, 2012She sports a strapless paisley Naeem Khan gown at the White House Correspondents' Association dinner in Washington, D.C.

March 14, 2012The First Lady looks regal in Marchesa as she joins President Barack Obama to welcome U.K. Prime Minister David Cameron and his wife Samantha at the White House.

February 29, 2012She makes her way down the White House's Cross Hall in a cobalt Jason Wu gown.

January 31, 2012Mrs. Obama pairs a Michael Kors sweater with a mint-green J.Crew pencil skirt at the Tonight Show with Jay Leno.

January 14, 2012She takes the stage in a one-shoulder J. Mendel gown at the BET Honors awards show.

November 13, 2011Mrs. Obama hosts the Asia-Pacific Economic Cooperation luncheon at Kualoa Ranch in Ka'a'awa, Hawaii, wearing a silk tropical number and Miriam Salat earrings.

June 7, 2011She poses for a photo on the grand staircase of the White House in an embellished Naeem Khan gown.

May 25, 2011The First Lady completes her off-the-shoulder Ralph Lauren gown with a Tom Binns necklace at the U.S. Ambassador's residence in London.

May 24, 2011She looks captivating in a Tom Ford gown at Queen Elizabeth's State dinner at London's Buckingham Palace.

January 19, 2011Mrs. Obama joins the President at the State dinner at the White House in a vibrant Alexander McQueen gown.

September 18, 2010She arrives at the Congressional Black Caucus Foundation's Phoenix Awards dinner in Washington, D.C., wearing a floor-length Michael Kors gown and chandelier earrings.

May 19, 2010The First Lady looks glamorous in a Peter Soronen gown and big curls at the State dinner for Mexican President Felipe Calderón at the White House.

May 5, 2010She attends the Cinco de Mayo reception in the Rose Garden of the White House in a multi-colored Thakoon dress.

May 1, 2010Mrs. Obama stuns in a crimson Prabal Gurung gown at the White House Correspondents' Association dinner in Washington, D.C.

April 13, 2010A full-skirted, printed Tracy Reese dress shows of her playful side at the Benito Juárez International Airport in Mexico City.

November 24, 2009She accompanies the President to greet Indian Prime Minister Manmohan Singh and his wife Gursharan Kaur at the White House, wearing a silver-appliqué Naeem Khan gown.

November 13, 2009The First Lady complements her marigold J.Crew ensemble with a wide laser-cut belt at a women's health insurance reform event at the White House.

May 10, 2009She attends the White House Correspondents' Association dinner in a bright Michael Kors sheath dress.

February 26, 2009Mrs. Obama looks flawless in an emerald Kai Milla dress while hosting the Stevie Wonder In Performance at The White House: The Library of Congress Gershwin Prize event.

January 20, 2009She stands out in a sophisticated Jason Wu gown at the Inaugural Ball in Washington, D.C.