Jeremy Clarkson has announced that he has been diagnosed with an “aggressive” form of cancer.

The former “Top Gear” host revealed the diagnosis during an episode of “Clarkson’s Farm,” a series that follows his efforts to run a farm in England.

“I’ve got cancer,” he told Charlie Ireland and Kaleb Cooper, his co-hosts on the show, which airs on Amazon Prime Video. “It’s aggressive but it’s really early.”

Best known for presenting motoring shows “Top Gear” and “The Grand Tour,” Clarkson, 66, posted a video on his Instagram on Tuesday revealing that there would be some “somber news” in upcoming episodes of “Clarkson’s Farm.”

“Ordinarily we try to keep the show bucolic and charming and cheerful, but the final two episodes which drop in the middle of the night tonight are none of those things,” he said.