Chelsea Clinton through the years

Clinton speaks onstage at City Harvest's 23rd Annual Evening of Practical Magic at Cipriani 42nd Street on April 25, 2017, in New York City.

Chelsea Clinton speaks onstage at the GMHC 35th Anniversary Spring Gala at Highline Stages on March 23, 2017, in New York City.

Chelsea Clinton and Marc Mezvinsky attend the School Of American Ballet's 2017 Winter Ball at David H. Koch Theater at Lincoln Center on March 6, 2017, in New York.

Chelsea Clinton introduces President Obama after they stump for Hillary Clinton on the eve of the election at the Ray L. Fisher Stadium in Ann Arbor, Mich., on Nov. 7, 2016.

Chelsea Clinton speaks to a crowd while campaigning for her mother at Arizona State University in Tempe, Ariz., on Oct. 19, 2016.

Chelsea Clinton introduces her mother, Hillary Clinton, as they embrace on stage at the Democratic convention in Philadelphia on July 28, 2016.

Chelsea Clinton, holding her newborn son Aidan, Marc Mezvinsky, Bill Clinton and Hillary Clinton exit Lenox Hill Hospital on June 20, 2016.

Bill Clinton, Marc Mezvinsky and Chelsea Clinton greet Hillary Clinton during a primary night event on June 7, 2016, in Brooklyn after she surpassed the number of delegates needed to become the Democratic nominee.

Chelsea Clinton campaigns for her mother at Denizens Brewing Company in Silver Spring, Md., on April 21, 2016.

Chelsea Clinton addresses the audience at the launch of ServiceNations's "Serve A Year" campaign at the El Capitan Theatre on March 23, 2015, in Los Angeles.

Chelsea Clinton and her family are seen leaving Lenox Hill Hospital in New York on Sept. 29, 2014, with her newborn baby Charlotte Mezvinsky.

Hillary Clinton shares the stage with Chelsea Clinton while speaking at the Clinton Foundation's No Ceilings: The Full Participation Project at the Lower Eastside Girls Club on April 17, 2014, in New York.

Bono and Chelsea Clinton sit in the front row at Edun at Mercedes-Benz Fashion Week on Feb. 9, 2014, in New York.

Bill and Chelsea Clinton wave to greet the crowd as they attend the official memorial ceremony for late South African president Nelson Mandela at FNB Stadium in Johannesburg, South Africa, on Dec. 10, 2013.

Chelsea Clinton marries ceremony with Marc Mezvinsky on July 31, 2010 in Rhinebeck, New York.

Chelsea and Hillary Clinton appear at the Democratic convention in Denver on Aug. 26, 2008.

Chelsea Clinton attends a ceremony to unveil Clinton portraits in the East Room of the White House on June 14, 2004.

The Clintons tour the Forbidden City in Beijing on June 28, 1998, as a Chinese security agent looks on.

From left: Chelsea Clinton, President Clinton and Hillary Clinton get splashed by water as they run the Big Kahuna Rapids during a raft trip on the Snake River near Alpine Junction, Wyo., on Aug. 17, 1996.