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I'll start with Cyb and Patricia Barnstable - perhaps better known as Betty I and Betty II on the short lived TV series Quark.
Quark had everything going for it: (1) science fiction was the rage thanks to Star Wars, (2) the writer was none other than Buck Henry and (3) it featured the smoking hot Cyb and Patricia Barnstable. There was only one problem... the show just wasn't very funny. Not a good quality in a comedy. The show was cancelled after only 7 episodes. (For more on this interesting little show, read a previous post.)
A few facts:
They were Doublemint Twins and cheerleaders for the University of Kentucky.
Their father was a great basketball player at UK and won an Olympic gold medal.
In 1971 their mother entered them in a beauty contest, so they drew straws to see who would enter. The "loser," Patricia, entered the contest and was named Miss Kentucky, and went on to become runner-up in the Miss USA pageant.
Cyb married a model, Lowell McGlothin. Judging strictly by his picture below, he seems kind of shmarmy. They divorced in 1984.
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Not too shabby. Now here's a few more screen caps from Quark...