Merv Griffin by Lester Cohen/ Merv Griffin by Lester Cohen/

Game-show mogul Merv Griffin, 82, is reportedly "gravely ill," according to Entertainment Tonight. The Jeopardy! creator was hospitalized and treated for prostate cancer - a recurrence of which was discovered during a routine medical exam - at Cedars-Sinai Medical Center in July, but sources now tell ET that his prognosis does not look good.

Griffin's reps have yet to confirm or deny these reports.