The host of Comedy Central's "The Daily Show" suggested this week that there were only four Founding Fathers, and that they are currently enshrined on Mount Rushmore.

Trevor Noah's historical flub, which was first noticed by the Washington Free Beacon, came Thursday evening as he interviewed Fox News contributor Juan Williams about his new book, We The People.

The cover of William's book features a mock-up of Mount Rushmore that swaps out the current faces for Ronald Reagan, Eleanor Roosevelt, Thurgood Marshall and Billy Graham.

"What's fascinating about this book is you're delving into the world of history, showing us, I guess, how we came to be here," Noah said.

"It really is a fascinating story, because whenever someone thinks of the Founding Fathers of this nation, there are four. They're on a mountain," he added. "And yet, what you've done in this book is you almost argued that there are more founders that don't have their faces on mountains."

The nation's founding involved more than just four men, and there are seven — John Adams, George Washington, John Jay, Thomas Jefferson, James Madison, Alexander Hamilton and Benjamin Franklin — who are cited regularly as being key figures in America's fight for independence.

Further, only two of the four faces included on Mount Rushmore, Washington and Jefferson, are considered founders. The other two faces, Theodore Roosevelt and Abraham Lincoln, served in office well after the nation's founding.

Williams politely and subtly corrected his South African host.

"Oh yeah, well, Mount Rushmore," the political commentator said. "Normally you think of the Founding Fathers Jefferson, Washington. Here on the cover of my book, I've got Billy Graham, Ronald Reagan, Eleanor Roosevelt and Thurgood Marshall and the idea is… And there's more than four."

"When people talk about the Founding Fathers, you've got about 50 people who signed the Declaration of Independence and others who were at the Constitutional Convention," he added.

"The Daily Show" is the chief source of news to nearly 12 percent of Americans online, according to data released last year by the Pew Research Center.