Which actress was cast as the original Jenna Wade on the popular American television series "Dallas"?

Jenna Wade is a fictional character on the popular American television series "Dallas", which revolves around the oil wealthy Ewing family of Texas, and is best known for being Bobby Ewing's first true love. As the story goes, they knew each other as children and youthful Bobby would ride over to visit her at a nearby ranch. He and Jenna were engaged at some point before he married Pamela Barnes, but she ditched him at the altar and ran off to Italy to marry Italian count Renaldo Marchetta. She, of course, eventually returns to Dallas and becomes involved in the usual twists and turns drama which unfold every week on the show.

The character of Jenna Wade was originally portrayed by Morgan Fairchild for one episode in 1978; Jenna was then portrayed by Francine Tacker for two episodes in 1980. When the character was brought back in 1983, the part was recast this time with most notably Priscilla Presley; she would be the third and final actress to portray the character.