In 1981 he was suppose to do a tv movie with Elizabeth Montgomery but when got the role of Chase of Falcon Crest he had to drop out and was replaced by Elliot Gould.
In an interview on television Foxworth said that the reason he and Elizabeth (Montgomery) didn't get married for nearly 20 years was because Elizabeth was hesitant because of her three failed marriages. And that the reason why they finally married was so that he could be able to make decisions about her health.
Robert was originally chosen to play the role of J.R. Ewing in the popular TV series "Dallas," but turned down the role because he thought the character was too evil.