Kenneth Wayne Jennings III (born May 23, 1974) is an American game show host, author, and former game show contestant. He is the highest-earning American game show contestant, having won money on five different game shows, including $4,522,700 on the U.S. game show Jeopardy!. From 2021 to 2023, Jennings and Mayim Bialik alternated as hosts of that show, as well as Celebrity... Wikipedia