The famed producer and TV writer popped up in Episode 1 of the tournament.
The newsman appeared in a category based on his reporting in Episode 1.
The comedian and actor gave a clue based on his new film Jumanji: The Next Level in Episode 1.
The Breaking Bad alum read clues from a chemistry-based category in Episode 1.
The Bless This Mess star appeared in Episode 1.
The American Idol host popped up in Episode 1.
The country crooner and American Idol judge gave players an answer in Episode 1.
The singer and American Idol judge delivered a clue in Episode 1.
The performer and current American Idol judge shared a clue in Episode 1.
The late night host shared an answer about fishing in his Episode 2 appearance.
The actress appeared for one clue in Episode 2 and delivered answers for the stage performance category in Episode 3.
The funnyman read a clue in Episode 3 and Episode 4.
The Oscar-winning actor delivered answers for an entire category in Episode 3.
The basketball legend presented clues for one of the categories during Episode 4.
The actor presented clues on a Canadian based category in Episode 4.
Jeopardy! fans basked in the joy of watching former champions Ken Jennings, Brad Rutter and James Holzhauer compete for the title of the greatest player of all time in Jeopardy! The Greatest of All Time, but they aren't the only familiar faces that appeared onscreen.
No, we're not talking about beloved host Alex Trebek, who remained as sharp as a tack in this tournament. This special programming event actually featured a slew of big names, not in-studio, but reading the answers for which contestants must find the corresponding question.
Will it be James Holzhauer, Ken Jennings or Brad Rutter? Vote in our poll!
The event kicked off on Tuesday, January 7 and the key of the game was for the players to win three matches. The first champion to successfully pull in three would be crowned Jeopardy!'s greatest of all time and be awarded the $1 million grand prize, with the runners up will walk away with $250,000 each.
In the end, Jennings was that winner by Night 4, with Holzhauer and Rutter coming in at second and third place. In the gallery above, we're breaking down all of the celebrities who appeared in the special event through the categories.