Barack Obama and Beyonce post throwback photos of Michelle Obama on her 55th birthday

Happy birthday, Michelle Obama!

The former first lady turned 55 years old on Thursday, and both her husband, Barack Obama, and her good friend, Beyonce, took to social media to honor her. The former president shared a sweet throwback of the two, the couple all smiles as he puts his arm around her.

"I knew it way back then and I’m absolutely convinced of it today -- you’re one of a kind, @MichelleObama," he wrote. "Happy Birthday!"

Meanwhile, Beyonce shared a black-and-white childhood photo of Michelle looking adorable in a short-sleeved dress while accessorizing with gloves and a hair bow and carrying a basket. 

"Bow down," Beyonce wrote.

Beyonce and husband JAY-Z have been close friends with Michelle and Barack for years. Bey memorably sang Etta James' "At Last" for the Obamas' first dance at his 2009 inauguration ball, and the foursome's relationship has only strengthened since then. Last July, the Obamas showed off their dance moves when they attended Beyonce and JAY-Z’s concert at FedEx Field in Landover, Maryland.

Prior to that, Mrs. O was captured dancing with Beyonce's mother, Tina Knowles, as JAY-Z performed in Paris.

In an open letter in 2012, Beyonce gushed about Michelle.

"Michelle is the ULTIMATE example of a truly strong African American woman," Beyonce wrote. "No matter the pressure, and the stress of being under the microscope -- she's humble, loving, and sincere."

"Michelle, thank you so much for every single thing that that u do for us -- I am proud to have my daughter grow up in a world where she has people like you to look up to," she added.

The respect is mutual. In May of that year, Michelle admitted she fantasizes about being Beyonce in a sit-down interview with rapper Wale that was shared on Instagram. 

"If I had some gift, I'd be Beyonce," she said. "I'd be some great singer. The power of music, being able to play an instrument… It looks like musicians just have the most fun."

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Beyonce performing for Barack and Michelle Obama
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Beyonce performing for Barack and Michelle Obama
WASHINGTON - JANUARY 20: US President Barack Obama dances with his wife and First Lady Michelle Obama as Beyonce sings 'At Last' during the first Inaugural Ball on January 20, 2009 in Washington, DC. Obama was sworn in as the 44th President of the United States today, becoming the first African-American to be elected President of the US. (Photo by Win McNamee/Getty Images)
WASHINGTON - JANUARY 20: US President Barack Obama dances with his wife and First Lady Michelle Obama as Beyonce sings 'At Last' during the first Inaugural Ball on January 20, 2009 in Washington, DC. Obama was sworn in as the 44th President of the United States today, becoming the first African-American to be elected President of the US. (Photo by Win McNamee/Getty Images)
WASHINGTON - JANUARY 20: US President Barack Obama dances with his wife first lady Michelle Obama as Beyonce sings 'At Last' during thei first Inaugural Ball on January 20, 2009 in Washington, DC. President Obama is hosting ten Inaugural Balls this eveing. Obama was sworn in as the 44th President of the United States today, becoming the first African-American to be elected President of the US. (Photo by Win McNamee/Getty Images)
WASHINGTON - JANUARY 20: US President Barack Obama dances with his wife first lady Michelle Obama as Beyonce sings 'At Last' during thei first Inaugural Ball on January 20, 2009 in Washington, DC. President Obama is hosting ten Inaugural Balls this eveing. Obama was sworn in as the 44th President of the United States today, becoming the first African-American to be elected President of the US. (Photo by Win McNamee/Getty Images)
NEW YORK, NY - SEPTEMBER 26: Beyonce and Michelle Obama hug during the 2015 Global Citizen Festival at Central Park on September 26, 2015 in New York City. (Photo by Taylor Hill/WireImage)
NEW YORK, NY - SEPTEMBER 26: Beyonce and First Lady Michelle Obama pose onstage during 2015 Global Citizen Festival to end extreme poverty by 2030 in Central Park on September 26, 2015 in New York City. (Photo by Kevin Mazur/Getty Images for Global Citizen)
NEW YORK, NY - SEPTEMBER 26: Beyonce and Michelle Obama hug during the 2015 Global Citizen Festival at Central Park on September 26, 2015 in New York City. (Photo by Taylor Hill/WireImage)
WASHINGTON, DC - JANUARY 21: First lady Michelle Obama greets singer Beyonce after she performs the National Anthem during the public ceremonial inauguration on the West Front of the U.S. Capitol January 21, 2013 in Washington, DC. Barack Obama was re-elected for a second term as President of the United States. (Photo by Rob Carr/Getty Images)
WASHINGTON, DC - JANUARY 21: First lady Michelle Obama (L) greets singer Beyonce after she performs the National Anthem during the public ceremonial inauguration for U.S. President Barack Obama on the West Front of the U.S. Capitol January 21, 2013 in Washington, DC. Barack Obama was re-elected for a second term as President of the United States. (Photo by John Moore/Getty Images)
US President Barack Obama, First Lady Michelle Obama (2nd L) and family members listen to Beyonce sing the National Anthem during the 57th Presidential Inauguration ceremonial swearing-in at the US Capitol on January 21, 2013 in Washington, DC. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
First Lady Michelle Obama greets singer Beyonce during the 57th Presidential Inauguration ceremonial swearing-in at the US Capitol on January 21, 2013 in Washington, DC. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
Beyonc�receives a kiss from the First Lady Michelle Obama after she sang the National Anthem at the closing of the 57th Presidential Inaugural ceremony at the U.S. Capitol where President Barack Obama was sworn in for his second term in Washington, D.C. on Monday, January 21, 2013. Photo Ken Cedeno (Photo by Ken Cedeno/Corbis via Getty Images)
First Lady Michelle Obama (R) and her daughters Malia (C) and Sasha cheer as Beyonce returns to her seat after singing the Star Spangled Banner after the swearing-in of U.S. President Barack Obama in Washington, January 21, 2013. REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS)
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