Studied art for one year at Syracuse University.

Measurements: 36C-25-35 (Source: Celebrity Sleuth magazine)

Was replaced by Paula Prentiss after two weeks of filming on The Stepford Wives (1975).

Joanna's trademark infectious, roaring cackle is her natural laugh.

Has appeared in episodes of three different series with Robert Foxworth: "Falcon Crest" (1981), "Six Feet Under" (2001) and "Enterprise" (2001).

Auditioned and won the role for the TV series "Wonder Woman" (1976) but director Jack Arnold absolutely refused to be involved with the series unless he had Lynda Carter. Lynda had the role from that point on. Ironically, Lynda auditioned for the original TV movie version of Wonder Woman (1974) (TV) but the role went to Cathy Lee Crosby.

Elected to the 2007-2008 Screen Actors Guild National Board of Directors.