'Jeopardy!' host Alex Trebek is one of the most recognizable faces in U.S. television.
Reuters reports the Canadian-born TV personality has been diagnosed with stage 4 pancreatic cancer.
In a video message on Wednesday, Trebek vowed to beat the disease despite its low survival rate.
Trebek has hosted the syndicated game show since 1984, in which contestants must state their answers in the form of a question.