Ernestine is Ernie's baby cousin, who occasionally appeared with Ernie in Sesame Street inserts. In one skit, Ernie described the differences between them, but it was revealed that they share the same laugh (First: Episode 2053). In another skit, Ernie tried to get Ernestine to say his name, which she failed to do, instead blurting out "Bert!" (First: Episode 2586) She was also featured in the song "Taking a Picture," as the photographic model for Olivia.
- Ernestine the Telephone Operator, Lily Tomlin character