The comedic minds at "The Tonight Show Starring Jimmy Fallon" cut together dozens of clips of the straight-laced Williams making it look as if he were rapping the 1979 hip-hop classic "Rapper's Delight."
Edited clips of fellow NBC anchor Lester Holt join Williams later in the video along with a cameo from Greenwich's Kathie Lee Gifford.
Williams has flashed a dry sense of humor in the past, appearing many times on Comedy Central's "The Daily Show With Jon Stewart."
Click here to follow Daily Voice New Canaan and receive free news updates.