Jimmy Fallon, the host of his eponymous late-night talk show, will guest-host TODAY this morning with Hoda Kotb.
How'd he prepare (besides joking -- we think -- that he downed two shots of Jager)?
"I pulled an all-nighter," he said. "I was up on the roof, making snowmen." Watch the full video below.
And it looks like he's settling in! Look at the image on the right of his "own dressing room" that he tweeted earlier this morning.
And come back to allDAY later for more!