Trebek's wife, Jean, has shared a photo of the couple's 1990 wedding on Instagram in a touching tribute, thanking the world for the outpouring of support.
"My family and I sincerely thank you all for your compassionate messages and generosity," she wrote.
"Your expressions have truly touched our hearts. Thank you so very, very much," she continued before signing off: "Many Blessings to all, Jean Trebek."
As People magazine notes, Alex and Jean Trebek met in 1988 and married two years later. The couple had two children together: Emily, 27, and Matthew, 29.
And earlier this year, Alex opened up to People about how Jean supported him while he was battling cancer: "She's kept me alive," he said. “If it weren’t for Jean, I’d have put myself out of this a long time ago.”