That is sad, for both - here's what they died of ...
Cash:
"Johnny died due to complications from diabetes, which resulted in respiratory failure," said Cash's manager, Lou Robin, in a press release issued by Baptist Hospital in Nashville.
Ritter:
Ritter fell ill Thursday on the set of his ABC sitcom "8 Simple Rules ... For Dating My Teenage Daughter," said Susan Wilcox, his assistant of 22 years.
The cause of death was a dissection of the aorta, the result of an unrecognized flaw in his heart, said his publicist, Lisa Kasteler.
Ritter was the youngest son of Western film star and country musician Tex Ritter.