In photos: Star-studded crowd gathers to celebrate the Obama Presidential Center dedication

Barack Obama opened his presidential center in Chicago with former presidents, celebrities and dignitaries in attendance. President Donald Trump was absent.

In photos: Star-studded crowd gathers to celebrate the Obama Presidential Center dedication

Fomer US president Barack Obama and his wife Michelle Obama arrive at the opening of the Barack Obama Presidential Center in Chicago.

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Former President Barack Obama opened his long-awaited presidential center in Chicago on Thursday, drawing a who's who of former presidents, dignitaries, celebrities and musical performers to an invite-only dedication ceremony on the city's South Side.

The Obama Presidential Center, a $850 million campus more than a decade in the making, officially opens to the public Friday. Thursday's ceremony featured guests such as Oprah Winfrey, Steven Spielberg, Stephen Colbert and Tom Hanks, with performances from Stevie Wonder, Bruce Springsteen, The Roots, Christina Aguilera and others.

All living former presidents and first ladies — except President Donald Trump and first lady Melania Trump — were in attendance.

Obama used the moment to pay tribute to Chicago, the city where he launched his political career, built his family and found community that helped shape his presidency.

"I found my purpose here, and I fortified my faith here, and I found my community here," Obama said.

The former president also made a pointed defense of democratic norms, saying the center was meant to carry forward "the shared values that make democracy possible," including "a belief in the peaceful transfer of power after the people have spoken in fair and free elections."

(L-R) Former President Joe Biden, former first lady Jill Biden, former President Barack Obama, former first lady Michelle Obama, former President George W. Bush, former first lady Laura Bush, former President Bill Clinton and former Secretary of State Hillary Clinton, pose for a photo ahead of the dedication ceremony.

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Former U.S. President Barack Obama waves as he attends a dedication ceremony for the opening of the Obama Presidential Center, accompanied by Michelle Obama, Malia Obama and Sasha Obama

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Christina Aguilera performs.

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Tom Hanks attends the dedication ceremony.

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Jennifer Hudson performs.

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Former Speaker of the House Nancy Pelosi (D-CA) (R) and her husband Paul Pelosi attend the dedication ceremony.

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George Lucas (L) and his wife Mellody Hobson attend.

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David Letterman reacts during the dedication ceremony.

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Former German chancellor Angela Merkel arrives.

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(L-R) Former second gentleman Doug Emhoff and former U.S. Vice President Kamala Harris wave as they arrive to the dedication ceremony.

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US singer Eddie Vedder performs.

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(L-R) Former U.S. President Barack Obama, Former first lady Michelle Obama, Malia Obama, and Sasha Obama cheer after the performance of Eddie Vedder and Guitars Over Guns.

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(L-R) Former U.S. President George W. Bush, Former U.S. President Joe Biden and Former first lady Jill Biden.

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Tems performs.

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Former U.S. President Barack Obama and Michelle Obama laugh.

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Marc Anthony performs.

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Former US President Barack Obama, left, and former US First Lady Michelle Obama during the opening of the Obama Presidential Center.

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Former U.S. President Barack Obama speaks.

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Bruce Springsteen performs.

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Stevie Wonder performs.

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