Jason Kells ESPN sleighed the holiday season during a festive edition Monday night countdown.

Kelce, 37, dressed as Santa Claus for the broadcast on Monday, Dec. 23, before the game between the New Orleans Saints and the Green Bay Packers at Lambeau Field in Green Bay, Wisconsin.

The show opened with Kells, dressed as jolly old St. Nicholas, singing an improvised version of "Silent Night" that made one of his Monday night countdown cohost

"Marcus Spears, aka Swagu / We'll see you soon," Kells sang. "Football awwww-something."

Inside Lambeau Field, Kelce was then seen sitting down Monday night countdown The analyst desk is still dressed as Santa.

Monday night countdown the host Scott Van Pelt Kelce's happy appearance was first teased on Monday afternoon.

"Coming to MNCD...," Van Pelt, 58, shared through xAlongside a photo of Kells as Santa and Van Pelt as Buddy the Elf, Will Ferrell's character the elf.

The first thing Van Pelt's followers noticed was Kells' significant weight loss, which made for a very slimmed-down Santa.

"Kells looks so thin!!" A person wrote through X. "Of course my dear Santa." Another said, "Omg Kells skinny Santa 🎅🏻."

on Thursday, November 19 bonus episode On Kelce's "New Heights" podcast, Kelce reveals how he discovered the truth about Santa Claus while growing up in Ohio.

"Someone told me, and I don't remember how old I was," he recalled. “I was in primary school. But I remember coming home and asking my parents and they explained to me, 'Unfortunately, it's not real. But we need you not to tell Travis.'

Kells co-hosts the popular podcast with his younger brother, Travis KelceWho credits Jason for not spilling the beans.

"Well, Jason didn't tell me," Travis, 35, said. "I figured it out myself when every gift had mom's handwriting on it."

Jason laughed as Travis remembered their mother. Donna KellsAccidentally let the cat out of the bag.

"I was like, 'That's how mom spells all our names,'" Travis said. “I was just like, 'What the f—? Where does Santa come from and not mom? Santa and mom have the same handwriting, it's crazy.'

The game between the Saints and Packers marks the final Monday night countdown Aired before Christmas. The crew returns to the air on Monday, December 30, when the Detroit Lions travel to San Francisco to take on the 49ers.