“Jeopardy” host Alex Trebek is hoping for a victory as he wages a battle against cancer.

Sources connected to Trebek tell us, the TV icon was just informed of the diagnosis. He recorded a video message announcing the news.

We’re told Alex’s intention is to finish out the current season of “Jeopardy.” In fact, he says he’s vowing to keep working and was bravely upbeat, saying he plans to beat cancer. Sources connected to the legendary host tell us he will immediately begin chemo.

Alex even joked his contract calls for him to host for 3 more years. 

Alex has been at the helm of the show since 1984 and it has been immensely successful ever since … dominating the evening game show biz along with “Wheel of Fortune.” Alex has always said he is not the star of the show … he says it’s all about the game and the contestants.

Trebek, who’s from Ontario, Canada, got his start in 1961 announcing the news and other events on the Canadian Broadcasting Corporation. He quickly rose to prominence by hosting a live music show and eventually a high school quiz show, called “Reach for the Top.”