[4] She began her career in theater, making her Broadway debut portraying a student leader in Red, White and Maddox (1969).
From 1974-1975, Brill played Fran Bachman on NBC's daytime drama How to Survive a Marriage.
Brill was also featured in episodes of The Guiding Light, All My Children, The Edge of Night, Lip Service and Kate and Allie.
She has one known animation credit when she guest starred as Elisa and Eliza Stitch in Courage the Cowardly Dog.
Brill had no experience as a puppeteer when she joined Sesame Street, for which she has won an Emmy Award, and created Prairie Dawn.