https://deadline.com/2022/04/joanna-...ry-1235013758/
She appeared in both versions of The Parent Trap.
I remember her from two episodes of The Beverly Hillbillies, as a rich debutante who (along with her mother) believe the Clampett's hillbilly look to be the Latest Fashion Craze. Snotty Mrs. Drysdale enrolls Elly May in an elite prep school to humiliate her. Jane Hathaway convinces the other girls that Elly May is merely wearing the newest look, which Joanna's character is eager to wear. Supposedly that's Sharon Tate on the left, dressed to partly resemble Audrey Hepburn in Breakfast at Tiffany's -- remember, this is a prep school in snotty rich Beverly Hills, so if you don't dress posh you really don't deserve to be there!!!
The Hillbillies mistake the Fenwick's garden shed for their home (it has "Fenwick House" written on it) and believe the Fenwicks are dirt poor. Widow Fenwick is a blue blood who agrees to Cynthia's suggestion to dress in overalls because Cynthia believes Elly Mae is setting the new fashion rage with her look. Granny tries to chase Widow Fenwick around the house to give her a bath! Later Jed with all his money is urged by Widow Fenwick to go into business with her on a housing development called "Honeymoon Lane". Jed of course thinks she wants to marry him. Also, Mrs. Drysdale insults Mrs. Fenwick, mistaking her for another hillbilly friend of the Clampetts.