Closing out her concession speech, Vice President Kamala Harris urged her supporters to remain optimistic despite the loss.

"I know many people feel like we are entering a dark time, but for the benefit of us all, I hope that is not the case," she said. "But here’s the thing, America, if it is, let us fill the sky with the light of a brilliant, brilliant billion of stars."

In her concession speech, Vice President Kamala Harris said she told former President Donald Trump that her team would "engage in a peaceful transfer of power."

"A fundamental principle of American democracy is that when we lose an election, we accept the results," Harris said. "That principle, as much as any other, distinguishes democracy from monarchy or tyranny. And anyone who seeks the public trust must honor it."

Vice President Kamala Harris has begun her concession speech at Howard University.

"The outcome of this election is not what we wanted, not what we fought for, not what we voted for," Harris said in the opening of her remarks. "But hear me when I say, the light of America's promise will always burn bright -- as long as we never give up, and as long as we keep fighting."

Vice President Kamala Harris' motorcade has arrived at Howard University, where she will deliver her concession speech, according to reporters traveling with her.

-ABC News' Fritz Farrow, Gabriella Abdul-Hakim and Will McDuffie