Ever since I was a little kid, whenever my parents would have company over, I would put on shows, whether they would be magic shows, singing shows, dancing shows, little skits.

Her first major role was in the 1995 film Dolores Claiborne. Muth's appearance as the daughter in the 1999 film The Young Girl and the Monsoon prompted the following review by Stephen Holden of The New York Times:

Ellen Muth a 19-year-old actress who looks considerably younger virtually explodes in the role of Constance the volatile 13-year-old only child of divorced parents. She has attended the Skip Barber Racing School.

Ellen Anna Muth (pronounced "Mewth"; born March 6 1981) is an American actress known for her role as George Lass in Showtime's series Dead Like Me.