Animation writer and executive, Joe Ruby, who co-created Scooby-Doo has died.
He died of natural causes on Wednesday at the age of 87.
His grandson said he never stopped writing and creating even as he aged.
Scooby-Doo launched in 1969.
He was also responsible for Alvin and the Chipmunks, Thundarr the Barbarian and more.
What was your favorite Saturday morning cartoon when you were younger?