Ken Jennings is a well-known American game show contestant and television personality, famous for his record-breaking run on the quiz show Jeopardy!. He first gained fame in 2004 when he won 74 consecutive games, earning over $2.5 million in prize money. His impressive knowledge and quick thinking made him a fan favorite, and he became a cultural icon in the world of trivia. After his time on Jeopardy!, Jennings transitioned into a career as a writer and speaker, sharing his love for trivia and knowledge. He has authored several books, including Brainiac: Adventures in the Curious, Competitive, Compulsive World of Trivia Buffs, and has appeared on various television programs, further solidifying his status as a trivia expert.