This article is about a fictional character. For the Ernestine branch of European royal houses, please see Wettin (dynasty).

Ernestine is a minor fictional Muppet character, used occasionally in Sesame Street segments, who is Ernie's niece.

Ernestine appeared in The Best of Ernie and Bert, a video of top Ernie and Bert segments.

Ernestine has been often mistaken for Natasha, who is of no relation in the series. Ernestine is circa 1988.