Former President Barack Obama and former first lady Michelle Obama at the opening of the Barack Obama Presidential Center on June 18, 2026.

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The grand opening of former President Barack Obama's presidential center in Chicago was a who's who of American influence.The guest list at the Obama Presidential Center included former presidents, world leaders, and some of the biggest names in entertainment.The 20-acre campus on Chicago's South Side, which cost $850 million in total and includes a public library, playground, and sports facilities, commemorates Obama's presidency from 2009 to 2017.Among those in attendance on Thursday were former Canadian Prime Minister Justin Trudeau and former German Chancellor Angela Merkel, Oprah Winfrey, Stevie Wonder, and Tom Hanks.Here's a look at some of the notable guests who attended.

Christina Aguilera sang at the opening.

Christina Aguilera performs during the dedication ceremony for the opening of the Barack Obama Presidential Center.