Flowers are placed on the Hollywood Walk of Fame star of TV host Alex Trebek in Los Angeles, California, on November 8, 2020. Reuters
Host Alex Trebek with contestants on 'High Rollers' in 1978. Getty Images
Betty White and Alex Trebek in Los Angeles, California, in 1986. Getty Images
Alex Trebek and actress Zsa Zsa Gabor in 1983. Getty Images
Alex Trebek poses in his home in Los Angeles, on July 7, 1988. AP Photo
Alex Trebek as himself and John Ratzenberger as Cliff Clavin in a 'Cheers' episode called 'What is... Cliff Clavin?' in 1990. Getty Images
Alex Trebek, Merv Griffin, creator of 'Jeopardy' and 'Wheel of Fortune', and Vanna White, hostess on 'Wheel of Fortune,' celebrate as they turn the switch on the Game Show Network on December 1, 1994 in California. Reuters
'Jeopardy' host Alex Trebek with late night host Jay Leno during an interview on November 14, 1994. Getty Images
Emmy Award-winning game show host Alex Trebek celebrates his newly dedicated star on the Hollywood Walk of Fame in Los Angeles, on May 17, 1999. AP Photo
Alex Trebek poses as 'Jeopardy' is inducted into the 'Guinness Book of World Records' in Culver City, California, in 2005. Getty Images
Television host Alex Trebek and actor Keanu Reeves attend the 33rd Annual Toyota Pro/Celebrity Race on April 18, 2009 in Long Beach, California. Getty Images
Television hosts Pat Sajak and Alex Trebek accept the Lifetime Achievement Award during the 38th annual Daytime Entertainment Emmy Awards at the Las Vegas Hilton in Las Vegas, Nevada, on June 19, 2011. Reuters
Alex Trebek and wife Jean Currivan Trebek arrive at the 38th annual Daytime Emmy Awards show in Las Vegas, Nevada, on June 19, 2011. AFP
'Jeopardy!' host Alex Trebek speaks as he is inducted into the National Association of Broadcasters Broadcasting Hall of Fame on April 9, 2018 in Las Vegas, Nevada. AFP
Alex Trebek gestures while presenting an award at the 46th annual Daytime Emmy Awards in Pasadena, California, on May 5, 2019. AP Photo
Flowers are placed on the Hollywood Walk of Fame star of TV host Alex Trebek in Los Angeles, California, on November 8, 2020. Reuters
Host Alex Trebek with contestants on 'High Rollers' in 1978. Getty Images
Betty White and Alex Trebek in Los Angeles, California, in 1986. Getty Images
Alex Trebek and actress Zsa Zsa Gabor in 1983. Getty Images
Alex Trebek poses in his home in Los Angeles, on July 7, 1988. AP Photo
Alex Trebek as himself and John Ratzenberger as Cliff Clavin in a 'Cheers' episode called 'What is... Cliff Clavin?' in 1990. Getty Images
Alex Trebek, Merv Griffin, creator of 'Jeopardy' and 'Wheel of Fortune', and Vanna White, hostess on 'Wheel of Fortune,' celebrate as they turn the switch on the Game Show Network on December 1, 1994 in California. Reuters
'Jeopardy' host Alex Trebek with late night host Jay Leno during an interview on November 14, 1994. Getty Images
Emmy Award-winning game show host Alex Trebek celebrates his newly dedicated star on the Hollywood Walk of Fame in Los Angeles, on May 17, 1999. AP Photo
Alex Trebek poses as 'Jeopardy' is inducted into the 'Guinness Book of World Records' in Culver City, California, in 2005. Getty Images
Television host Alex Trebek and actor Keanu Reeves attend the 33rd Annual Toyota Pro/Celebrity Race on April 18, 2009 in Long Beach, California. Getty Images
Television hosts Pat Sajak and Alex Trebek accept the Lifetime Achievement Award during the 38th annual Daytime Entertainment Emmy Awards at the Las Vegas Hilton in Las Vegas, Nevada, on June 19, 2011. Reuters
Alex Trebek and wife Jean Currivan Trebek arrive at the 38th annual Daytime Emmy Awards show in Las Vegas, Nevada, on June 19, 2011. AFP
'Jeopardy!' host Alex Trebek speaks as he is inducted into the National Association of Broadcasters Broadcasting Hall of Fame on April 9, 2018 in Las Vegas, Nevada. AFP
Alex Trebek gestures while presenting an award at the 46th annual Daytime Emmy Awards in Pasadena, California, on May 5, 2019. AP Photo
Flowers are placed on the Hollywood Walk of Fame star of TV host Alex Trebek in Los Angeles, California, on November 8, 2020. Reuters