Michelle Obama officiated Chicago wedding: report

Former first lady Michelle ObamaMichelle LeVaughn Robinson ObamaOvernight Health Care: Trump reportedly lashed out at health chief over polling | Justices to hear ObamaCare birth control case | Trump rolls back Michelle Obama school lunch rules Trump to roll back Michelle Obama's school lunch rules on vegetables, fruits Barack Obama shares birthday message to Michelle: 'In every scene, you are my star' MORE reportedly helped a Chicago couple tie the knot on Saturday, officiating a wedding at the city's Theater on the Lake.

USA Today reported that Obama officiated the ceremony for Stephanie Rivkin and Joel Sircus. One attendee posted a video of Obama reciting vows into a microphone with the caption "Holy Moly. That moment when Michelle Obama officiated at your [cousin's] wedding."

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The Instagram post was later deleted, but not before TMZ published it.

USA Today reported that Obama's connection to the couple comes through the bride, whose parents both have ties in politics.

Rivkin is the daughter of former Chicago Deputy Mayor Robert S. Rivkin and Cindy Moelis, who is the president of the Pritzker Traubert Foundation. That charity was started by Penny PritzkerPenny Sue PritzkerBiden's new campaign ad features Obama speech praising him Obama Commerce secretary backs Biden's 2020 bid DNC hauls in .5 million in June MORE, who served as former President Obama's commerce secretary.

The former first lady is expected to attend voter registration events in Las Vegas and Miami this week. Obama is serving as a co-chair of When We All Vote, a nonprofit initiative aimed at increasing voter turnout.

Obama is set to go on a monthlong book tour later this year to promote her new memoir, "Becoming." The arena tour kicks off in Chicago on Nov. 13, with seats and VIP packages fetching high prices.