Kamala Harris certified as Democratic presidential nominee after earning majority of roll call votes

Vice President Kamala Harris has been officially certified as the Democratic presidential nominee after getting the vast majority of delegate votes in a virtual roll call, the Democratic National Committee said.

Harris received 4,567 votes from delegates in the roll call, which concluded Monday evening, according to the Democratic National Committee.

"With the support of 99% of all participating delegates in the virtual roll call, Vice President Harris has historic momentum at her back as we embark on the final steps in officially certifying her as our Party’s nominee. We thank the thousands of delegates from all across the country who took seriously their responsibility throughout this process to make their voices – and the voices of their communities – heard," party chair Jaime Harrison and Democratic National Convention Committee Chair Minyon Moore said in a statement.

Harrison said on X Tuesday evening that he has officially signed the paperwork to certify her as the Democratic nominee for president.

Harris herself verbally accepted the nomination at her rally with her newly announced presidential running mate, Minnesota Gov. Tim Walz, on Tuesday in Philadelphia.

"And just last night, the delegates to the Democratic National Convention finished voting -- and so -- I stand before you today to proudly announce I am now officially the Democratic nominee for President of the United States!" she told the crowd.

Walz has also been officially certified as the Democratic Party’s nominee for vice president, DNC leaders said Tuesday.

Harris is the first Black and South Asian woman to lead a major party ticket.

Harris had effectively been the party's nominee since Friday, when Harrison announced on a livestream call that Harris had earned enough Democratic Party delegate votes in a virtual roll call to secure the party's nomination.

Harris was the only competitive candidate that launched a campaign to succeed President Joe Biden after his withdrawal from the race, and the only candidate that received enough delegate signatures to progress to the virtual roll call.

Convention delegates have been virtually voting by email or phone since 9 a.m. ET on Thursday in a virtual roll call set up by the Democratic National Committee. Delegates had until Monday at 6 p.m. ET to vote in the nomination process.

The DNC initially decided in May to hold a virtual roll call because of uncertainty over deadlines to get on the ballot in Ohio. The state legislature eventually rectified the issue, but the DNC has argued that Republican lawmakers in Ohio are acting in bad faith and that the Democratic candidate needs to be nominated earlier than the convention to avoid legal issues. Ohio leaders have denied this allegation.

ABC News' Gabriella Abdul-Hakim, Fritz Farrow and Will McDuffie contributed to this report.