Does anyone know if Joyce DeWitt was ever married or has any children? I know a lot about the other cast mates, but don't know much about Joyce.

From what I know, no. She has said that she never wanted to be married. To be honest, I don't think she would have the patience with kids. Just read Come knock on our door, you can tell she makes references to little kids and their hyperactivity.

Though, on imbd, it says that she was married to Ray Bukentica for a year. But any Joyce Dewitt fan knows thats not true because they broke up at the end of the 4th season of Three's Company.