Made For TV Movie/Play, From The 60's

Look up Kraft on IMDB. They had a few shows in the 60s such as Kraft Suspense Theater, Kraft Music Hall, Kraft Summer Music Hall, etc. I looked at a few, but did not see any names that stuck out.

Also google, BROTHER SISTER SINGING DUO. Wikipedia has a list of singing siblings.

In my previous post, I mentioned the Cowsills. I now realize that most of their minor hits occurred before their TV show(s). The exception was, "Hair", which was released after the musical had been on Broadway for a while. OT: For such an obscure singing group, I was surprised how many times this family was on TV. Susan Cowsill, now in her 50s, has been on TV four times in the past ten years.

I also happened to notice that the Carpenters appeared a few times on TV several years before they had major hits in the 70s. Perhaps you remember them (or another famous pair) as their was a gap between TV appearances and becoming famous.