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Shelly Costanza
Gender Female
Family Cousins: George Costanza & Unnamed Cousin

Uncle: Frank Costanza

Aunt: Estelle Costanza

First Appearance "The Contest"
Last Appearance "The Contest"
Portrayed By Rachel Sweet

Shelly is George Costanza's cousin, to whom she bears a strong resemblance. She appeared only once, in “The Contest”.


Not much is known about her, only that she is a cousin of George Costanza, and niece of Estelle and Frank Costanza. She visited her aunt Estelle in the hospital after falling after she caught George with a Glamour magazine. Shelly knows about George's writing job at NBC, as she had asked him about it during the visit, but he failed to answer due to the sponge bath of a female patient nearby.

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