A highly anticipated presidential debate between Kamala Harris and Donald Trump will take place Tuesday at 9 p.m. ET, with less than two months until the 2024 presidential election.

What Happened: Trump and Harris will face off for the first time in Tuesday's presidential debate. The event will be 90 minutes in length with two commercial breaks.

ABC News, which is a unit of The Walt Disney Company (NYSE:DIS), is serving as host of the event, with a simulcast available for other media companies.

Trump and Harris are expected to cover a number of topics and policies that could win over undecided voters or potentially change the minds of voters who had already backed one of the two candidates.

The candidates will have muted mics when the other candidate is speaking and will be given two minutes time to answer questions from the moderators.

Ahead of the debate, Harris sent a warning to potential voters about what Trump will do at the debate.

"We should be prepared for the fact that he is not burdened by telling the truth," Harris said during a radio interview that was recorded last week, as reported by the New York Times. "We should be prepared for the fact that he is probably going to speak a lot of untruths."

Harris said Trump's past comments about President Barack Obama's birthplace and questions about presidential candidate Hillary Clinton serve as a blueprint of what to expect Tuesday night.

"I think he's going to lie. He has a playbook that he has used in the past, be it, you know, his attacks on President Obama or Hillary Clinton. So we should expect that some of that might come out," Harris added.

Why It's Important: The comments from Harris come as ABC News and other media companies airing the debate are tasked with the difficulty of trying to fact-check the comments from the two candidates in real time. The ABC News moderators could step in to clarify any false statements made by the candidates, but they will likely reserve fact-checking for a discussion following the debate in most cases.

Millions of viewers are expected to tune into the debate, with some experts seeing the highly anticipated face off coming close to the record 84 million viewers who watched the presidential debate between Clinton and Trump in 2016, which is the current debate record.