Michelle Obama officiated Chicago wedding: report

Former first lady Michelle ObamaMichelle LeVaughn Robinson ObamaMichelle Obama on 'Becoming': 'Sasha still hasn't read it' Michelle Obama seeks volunteers for local campaigns: There are 'no "off" years' Obama condemns 'hatred in all its forms' after New Zealand shooting 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 PritzkerMichelle Obama officiated Chicago wedding: report Election Countdown: Trump plans ambitious travel schedule for midterms | Republicans blast strategy for keeping House | Poll shows Menendez race tightening | Cook Report shifts Duncan Hunter's seat after indictment Former Obama officials launch advocacy group aimed at Trump's foreign policy 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.