More than 80 million people tuned in Monday night to watch Hillary Clinton and Donald Trump face off in the first presidential debate.
The debate set a new record in the history of televised presidential debates, becoming the most-watched in U.S. history, according to CNN.
The finals numbers aren't in yet, but the debate averaged a total of 80.9 million viewers across the 12 channels that carried it live.
Traditionally, Nielsen only measures viewership based on people who watch from their TVs at home. That means people who watched the debate from parties, bars, schools and restaurants were not counted.
The 80.9 million also doesn't include viewers who watched the debates on PBS and C-SPAN.
So, the total number of people watching Monday night could be significantly higher than 80 million.
Nielsen also confirmed that viewership remained high throughout the entire debate and there wasn't a significant drop-off after the first hour.
For comparison, the first Obama-Romney debate in 2012 averaged 67 million viewers.
The Jimmy Carter versus Ronald Reagan debate of 1980 was the record holder until last night, with an average of 81 million viewers.
On top of the huge television audience, Twitter said it was also "the most tweeted debate ever."
For more news, check out today's 60 Second Circa.