Former President Barack Obama Barack Hussein ObamaMomentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina Majority of voters say Trump should not nominate a Supreme Court justice: poll MORE officiated a wedding for two of his former White House staffers in Washington over the weekend, Washingtonian reports.

Obama presided over the Jan. 21 wedding of Dana Remus, a former lawyer for his administration, and Brett Holmgren, who served as a special assistant to the president and on the National Security Council as senior director for intelligence programs.

“We had decided to invite him because he was such an important part of our lives, we asked him if he could attend the wedding, and as we discussed it, he was intrigued with the idea of officiating a wedding,” Holmgren told the magazine.

Obama reportedly earned a temporary officiant's license through the city government and signed the couple's wedding certificate.

The family kept the former president's appearance a close secret until the ceremony, when he spoke after the bride walked down the aisle.

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The groom's mother, Mary Holmgren, told Washingtonian that Obama gave "very sincere remarks" that "came from the heart," personally commending the kind of people they were and complimenting their work.

Obama reportedly stayed briefly at the reception after the ceremony to take pictures with the family. Former first lady Michelle Obama Michelle LeVaughn Robinson ObamaTo honor Justice Ginsburg's legacy, Biden should consider Michelle Obama National Urban League, BET launch National Black Voter Day The Hill's Morning Report - Sponsored by The Air Line Pilots Association - White House moves closer to Pelosi on virus relief bill MORE was not able to attend the wedding.

The wedding took place in the city's newly opened District Winery in Navy Yard with about 120 guests.

Obama previously served as a groomsman in a wedding of his former personal aide Marvin Nicholson before leaving office last January.

The Obamas bought a house in the District after leaving the White House last year, so they could be around while their younger daughter Sasha finishes high school.