John Ritter, 54, 1948–2003

He was filming 8 Simple Rules when he fell ill. John Ritter passed away on September 11, 2003, less than a week before he’d turn 55. Today, we got to be reminded of this tragic loss on the Autopsy: The Last Hours Of documentary series.

John was an incredible actor, who’s mostly credited for the Three’s Company and Three’s a Crowd series of the ‘70s and ’80s. The 8 Simple Rules film was released after his death. At that time, he was married to Amy Yasbeck, his second wife. His four children survive him.