|First Appearance:||Be It Ever So Mortgaged|
|Last Appearance:|| Laugh, Clown, Laugh (Bewitched)
The Arrival of Nancy (Tabitha)
|Portrayer:|| Alice Pearce (1964-1966)
|Relatives:|| Harriet Kravitz (sister-in-law) |
Nancy Kravitz (niece)
Floyd Kravitz (nephew) 
Edgar (nephew) 
Tommy (nephew, sister's son) 
Flash Kravitz (nephew) 
Other nieces and nephews
|Residence:|| Morning Glory Circle |
Gladys Kravitz is extremely nosy, frequently peeking through her curtains at the Stephens' home. She is convinced that there is something strange going on in their household (and indeed there is, for Samantha Stephens often uses witchcraft that creates unusual events, and the Stephens' witch-and-warlock relatives come and go from the house), and she would yell "ABNER!", referring to her husband, although she can never adequately prove her assertions to him.
Kravitz's nosiness, her frustration at never being able to convince her husband or other neighbors of the odd behavior across the street, and the difficulties she causes the Stephens are all recurring themes on Bewitched. Samantha Stephens always comes up with a fabricated reason why Gladys Kravitz had seen what she had seen, and Gladys can never prove to others that there is anything beyond the ordinary happening at the Stephens', which causes her no end of annoyance and causes her to question her own impressions and even her sanity. Sometimes, however, when Gladys and her nosiness goes way too far, especially when it involves any city officials or the police, Samantha utters, in anger, that the trouble is "some more of Gladys Kravitz's handiwork!"
Gladys is one of the few, if not only, mortal characters to see through Samantha and Darrin's ruse. She clearly knows that there is something strange going on, even if she is not entirely sure of the source of the oddities. In contrast, Darrin's boss Larry Tate has frequent contact with Samantha and Darrin and never suspects a thing. Gladys is the one mortal who is observant (or nosy) enough to notice the effects of witchcraft at the Stephens' home, even though no one in the Stephens family ever admits to Gladys that Samantha is a witch.
Many years later, Nancy Kravitz, Gladys' niece, goes to visit her old childhood friend, Tabitha, in Los Angeles and not long after, Gladys and Abner soon show up. Much like she had with her mother, Gladys didn't much approve of Tabitha (she thought of her as a bad influence on Nancy), and was still as nosy as ever. She also ran afoul of Tabitha's Aunt Minerva.
- The first episode to be filmed with Alice Pearce was "Be It Ever So Mortgaged" with the last being "Baby's First Paragraph" before she died on March 3, 1966. However, her last appearance in the series was "Prodigy" which had been filmed earlier in 1965 and was presented as a flashback. Sandra Gould's first appearance in the role was "Endora Moves in for a Spell" and her last Bewitched episode was "Laugh, Clown, Laugh" with a later appearance in the Tabitha episode "The Arrival of Nancy".