Michelle Obama stuns in designer dress, sleek updo at White House state dinner

Michelle Obama is back at it as the first lady of fashion, wearing a bright yellow dress by Prabal Gurung and and a sleek updo at a White House state dinner hosted by President Obama for African leaders Tuesday night. 

This isn't the first time Michelle has stunned in a Prabal Gurung piece for a public appearance — she's a loyal fan of the Nepalese designer, donning his designs for Arthur Ashe Kids' Day last August:

NEW YORK, NY - AUGUST 24:  Christina McHale and Ryan Hsarrison high five with first lady Michelle Obama as she takes the stage to address the crowd ga... Matthew Stockman / Getty Images
Michelle Obama wears a colorful top by Prabal Gurung while attending Arthur Ashe Kids' Day on August 24, 2013 in New York City.

And a 9/11 memorial concert in Washington in 2011, among other events. 

WASHINGTON, DC - SEPTEMBER 11:  (R-L) U.S. President Barack Obama, first lady Michelle Obama, Vice President Joseph Biden and his wife Jill Biden atte... Alex Wong / Getty Images
Michelle Obama wears a classy Prabal Gurung design while attending "A Concert For Hope," an event hosted by Washington National Cathedral to mark the tenth anniversary of the 9/11 terrorist attacks.

Want to steal Michelle's style for a price you can afford? Check out Prabal Gurung's Target line, which launched in January 2013. 

Michelle Obama's effortless style

Image: First Lady Michelle Obama Hosts Talent Show At White House
Alex Wong

The first lady looks as sophisticated in designer dresses as she does in outfits from J. Crew.