This is where we'll leave our live coverage of the first day of the Democratic National Convention.

Here's a quick recap of today:

• Delegates have endorsed Tim Walz as their candidate for vice-president

• Alexandria Ocasio-Cortez takes to the stage — and doesn't hold back

• Former presidential candidate Hillary Clinton tells the crowd "something is happening in America". 

• President Joe Biden opens his speech with a call to end political violence in the US.

You can take a look back at all the developments below, or download the ABC News app and subscribe to our range of news alerts for the latest updates.

We're about to close this blog shortly, but that doesn't mean the fun has to end. 

You can read up on all the key moments in the story  below.

Ear bandages were a trendy accessory at the Republican National Convention. 

At the Democrats' iteration, embellished hats are proving popular. 

Here's a look at some spotted in the crowd today. 

Away from the convention, there's a significant political story out of the intelligence community today.

US intelligence agencies have said Iran is responsible for a hack of the Trump campaign, saying the activity was "intended to influence the US election process".

The hack came to light last week after several news outlets in the US reported receiving internal campaign documents, including a 271-page dossier on Republican Vice-Presidential candidate JD Vance.

The Kamala Harris campaign said it was also warned by the FBI that it had been targeted by hackers.

Trump was quick to blame Iran, and now US intelligence agencies including the FBI, the Office of the Director of National Intelligence and the Cybersecurity and Infrastructure Security Agency have concurred.

The agencies have put out a joint statement, saying they’re "confident" that the Iranians have used social engineering and other techniques to seek access to people involved in both presidential campaigns.

They said the activity included "thefts and disclosures".

"It is important to note that this approach is not new," the agencies said.

"Iran and Russia have employed these tactics not only in the United States during this and prior federal election cycles but also in other countries around the world."

In a post to Truth Social, Donald Trump has told followers there will be no debate on September 4. 

"Comrade Kamala Harris has just informed us that she will NOT do the FoxNews (sic) Debate on September 4th," he wrote.

The first debate between Harris and Trump is scheduled for September 10 on the US' ABC News. 

Trump has been pushing fora further two debates, which he says would be hosted by Fox News on September 4 and NBC on September 25. 

But Harris has previously said "Trump has to show up" to the ABC debate before she would agree to any further dates.

NBC News is reportedly in discussions with both campaigns about setting up a debate between the two vice-presidential nominees, Tim Walz and JD Vance.  

 Outside of Chicago, there's been a groundswell of support, especially for Alexandria Ocasio-Cortez's speech. 

Pod Save America co-host Jon Favreau was among those impressed, with others hinting at her future presidential candidate chances. 

They're people chosen to represent their state at their party's convention.

A delegate's main job is to decide who will be the party's presidential candidate. 

At the DNC today, we heard them formally vote to nominate Tim Walz as the party's vice-president candidate. 

With President Biden finished speaking, that's a wrap on the Democratic National Convention's first day of proceedings. 

It's currently 11.40pm in Chicago. 

We don't have official numbers on how many people have walked through the door today. 

The United Center, where the DNC is being held, has a capacity of about 23,000 for concerts.

For reference, here's a shot of the crowd during Hillary Clinton's speech. 

Around 50,000 people are expected to attend the convention across the week. 

That includes delegates, elected officials, Democratic Party big wigs and members of the press. 

Biden told supporters at the DNC they are in a "battle for the very soul of America". 

"As your president, I've been determined to keep America moving forward, not going back."