Kerry Washington is the host on DNC Day 4.
The final day of the Democratic National Convention wraps up with Kamala Harris' big moment: her acceptance speech in which she gets to tell her story to the millions of Americans watching.
Her campaign says, in addition to describing her middle-class upbringing, she will continue to stress optimism and patriotism -- the "politics of joy" -- the overall themes we've heard throughout the gathering.
Convention organizers have 100,000 balloons ready to drop at the end of the evening, according to a source with knowledge.
-ABC News' Brittany Shepherd
The fourth and final night of the DNC is officially underway.
The theme of the night is "For our future" and will feature a keynote address from Vice President Kamala Harris as she accepts the party's nominee for president.
Second gentleman Doug Emhoff said Vice President Kamala Harris remains focused on the issues even "while she is preparing for her big moment tonight."
"She has been in the Oval Office with the president on all of these major issues. She's been in the Situation Room on all these major issues, just with what's happening now," he said Thursday at an event about combating antisemitism hosted by the Jewish Democratic Council of America.
"She's still working on these issues while she is preparing for her big moment tonight. That's what leaders do," he continued.
-ABC News' Oren Oppenheim
Harris has spent the day continuing to review her speech and tweaking it by hand as she prepares to deliver what will be the most important remarks of her political life, a personal familiar with the preparation told ABC News.
-ABC News' Mary Bruce
