The normally unflappable Alex Trebek was brought to tears on "Jeopardy!" Monday night.

During the final Jeopardy round, Trebek asked contestants for their answers.

Dhruv Gaur, one of the contestants, wrote "We love you Alex!" with a heart instead of the word love, as his answer.

"That's very kind of you, thank you," Trebek said, choking up. The "wrong" answer left Gaur with $5.

Right before Gaur's message, Trebek shared he was reentering treatment for pancreatic cancer.

Since announcing the diagnosis, Trebek has worked to raise awareness about the disease.

He teamed up with the World Pancreatic Cancer Coalition to make a video last month encouraging people to wear purple in November and help spread the word about the disease and its symptoms on social media.

Pancreatic cancer is often deadly and goes undiagnosed until late stages.

World Pancreatic Cancer Day is Nov. 21.