Vice President Kamala Harris will make her first campaign appearances with Barack Obama and Michelle Obama, two of the most popular figures in the Democratic Party, at get-out-the-vote events this month in Georgia and Michigan.

It will be the former first lady's first time hitting the trail for Harris.

Harris, the Democratic presidential nominee, is set to appear with Obama in Georgia on October 24 and with Mrs. Obama in Michigan on October 26, according to a Harris campaign senior official who spoke on condition of anonymity to discuss events before they are officially announced.

The official did not disclose the cities where Harris will join the Obamas.

The former president recently campaigned for Harris in Pittsburgh and has appearances scheduled Friday and Saturday in Arizona and Nevada, respectively, and next week in Wisconsin and Michigan.

Early voting opens statewide in Michigan on October 26, and Harris and the former first lady will encourage supporters to cast their ballots as soon as possible, the official said.

In Georgia, where early voting opened this past Tuesday, more than 310,000 people voted on the first day, a record.

The Obamas endorsed Harris in July and spoke at the Democratic National Convention in August in Chicago. They remain prodigious fundraising draws and popular surrogates at large campaign events for Democratic candidates.

It was previously announced that Mrs. Obama will headline a rally in Atlanta on October 29, three days after joining Harris in Michigan.

The rally, which will feature celebrities and civic leaders, is being hosted by When We All Vote, a nonpartisan civic engagement organisation that the former first lady founded in 2018 to reach out to people who are less likely to become involved in politics and elections.

Among the group's celebrity co-chairs are NBA players Stephen Curry and Chris Paul; musical artists Jennifer Lopez and Janelle Monáe; beauty influencer Bretman Rock; and actors Tom Hanks, Selena Gomez, Lin-Manuel Miranda and Kerry Washington.

The friendship between Harris and the Obamas goes back 20 years, when the former president and current vice president met during his campaign for the US Senate. She was an early supporter of his 2008 presidential campaign and went door-knocking for him in Iowa before the caucuses.