Kenneth Wayne Jennings III is an American game show host, former contestant, and author. He is best known for his work on the syndicated quiz show Jeopardy! as a contestant and later its host. Jennings was born in Seattle, Washington but grew up in South Korea and Singapore. He worked as a computer programmer before he tried out for Jeopardy! in 2004. During his initial run, Jennings secured a consecutive 74 wins, setting the record as the highest-earning American game show contestant and bringing significant media attention and viewership.
Afterwards, Jennings pursued a career as an author, writing about his experience and exploring American trivia history and culture in a series of best-selling books. He also appeared on other game shows, including The Chase, and hosted the Omnibus podcast. He returned to Jeopardy! in 2020 as a producer, and later guest-hosted the program after the death of host Alex Trebek the same year. He split full-time hosting duties initially with actress Mayim Bialik until 2023, when he was made the sole host.