Marilyn is Lily's niece, although her surname is Munster. She attends Westbury College in Mockingbird Heights, the city where the Munsters live.
Like the rest of her family, she believes that the Munsters' appearance and lifestyle are normal, although Marilyn is actually the only family member whose appearance does not shock or disturb people outside the family. She is considered attractive by outsiders, but by the aesthetic standards of her family she is distressingly unattractive.[2][3] Marilyn laments that she keeps scaring away potential boyfriends, not realizing that the young men are frightened away by her family.
Actresses
In the original series Marilyn was played in the first thirteen episodes by Beverly Owen,[4] who left because she married and moved to New York,[5] and then by Pat Priest starting with the fourteenth episode.[6]
^https://bestlifeonline.com/pat-priest-marilyn-munsters-news/: "Marilyn was a normal, attractive young woman surrounded by a family of actual monsters, which made her the unlikely black sheep. Of course, with her aunt and uncle being Frankenstein's monster and a vampire, Marilyn's family thought the pretty blond was unfortunately hideous."