DNC 2024 Day 1 live updates: Biden lays out choice to 'save democracy' with Harris

Golden State Warriors coach Steve Kerr got a standing ovation when he walked on stage, just over a week after he coached the U.S. Olympic men's basketball team won gold.

Chants of "USA" stretched across the convention floor as he started speaking.

"It was the proudest moment of my life," he said, recounting the team's victory in Paris earlier this month.

Kerr called the audience to action -- asking the country to follow in the footsteps of the American basketball team's gold medal performance in Paris.

"After the results are tallied [on election] night, we can, in the words of the great Steph Curry, we can tell Donald Trump, 'night-night.'"

6:43

NBA coach Steve Kerr greeted with applause at DNC

Team USA coach Steve Kerr closes DNC speech: "After the results are tallied [on Election Night], we can — in the words of the great Steph Curry — we can tell Donald Trump: "Night, night."

ABCNews.com

Convention staff is preparing for possible disruptions over Gaza during President Joe Biden's keynote speech.

ABC News has heard from staff and activists that they likely won't come from uncommitted delegates on the convention floor, but are expected to come from activists who have passes into the arena who are in sections higher up.

-ABC News' MaryAlice Parks and Isabella Murray

Actor Tony Goldwyn, who famously played a president on TV in ABC's "Scandal," has arrived for the primetime hour of the DNC's first night.

Goldwyn said the choice between Harris and Trump is between "two very different futures" for our middle class, reproductive rights, climate, security, schools and "the future of our very democracy."

He said Harris has a message for America.

"It is a message that's joyful, not mean-spirited, a message of public service, not self-service, a message of optimism and opportunity, not chaos and division. A message that has woken us up to who we are, to who we've always," he said.

Harris sent the crowd into a frenzy when she walked onto the stage at the United Center, with attendees jumping to their feet in surprise.

"It is so good to be with everyone this evening in this hall and everyone at home. This is going to be a great week," she said to more applause.

Harris also gave Biden his flowers, sparking chants of "USA!"

"And I want to kick us off by celebrating our incredible president, Joe Biden, who will be speaking later tonight," she said. "We are forever grateful to you."

Harris walked off to her campaign anthem, Beyonce's hit song "Freedom."

2:32

Kamala Harris enters the arena on opening night of the DNC

Vice President Kamala Harris entered the arena ahead of President Joe Biden's keynote address on opening night of the 2024 Democratic National Convention.

ABCNews.com