When it comes to children’s cartoons, there are a few household names out there. From Spongebob Squarepants to The Fairly Oddparents, there’s plenty for kids to enjoy. One that’s as old as time itself is the Scooby-Doo series, a cartoon about friends solving various mysteries. The laughs and entertainment from the show are iconic in every way, shape, and form. One of its co-creators, Ken Spears, is largely credited to his success. Unfortunately, that man passed away on Friday due to complications with Lewy body Dementia.

Ken Spears’ passing comes just three months after his animation partner Joe Ruby passed away. The duo were the masterminds behind the Scooby-Doo, Where are You! television series which began in 1969. Since then, the show has gone on to huge commercial and critical success, spawning other various shows and movies. It’s one of the most iconic television series in the world, which I even remember watching as a kid. The passing of the creator duo is sad to hear, but their legacy will no doubt live on in the months and years to come.

The Scooby-Doo co-creator’s passing was originally revealed by his son, Kevin Spears. In an interview with publication Variety, Kevin had this to say of his father: