Tragically, John passed away during the show's filming, but his influence clearly lived on in later seasons.
In honor of John and his lasting legacy, let's take a look at what the cast of 8 Simple Rules has been doing since the show wrapped 10 years ago.
Who could've guessed that the lovably dim-witted Bridget would go on to be one of the biggest TV stars of our generation?
But the family is thrown for a loop when Cate's wayward nephew, C. (David Spade), moves in and finds it hard to resist getting himself into trouble or offering questionable advice to the kids.
Now more than ever, Cate needs to be there for her kids - particularly her daughters.
It's a time for healing and learning to deal with life without family patriarch Paul (the late John Ritter), as the Hennessys discover the frailties of life and the strength of the family unit, on 8 Simple Rules.