Rupp has appeared in recurring roles on numerous television shows, including Friends as Phoebe's sister-in-law, Seinfeld as Jerry's ditsy booking agent, and ER. Additionally, she appeared in the Emmy-nominated series From the Earth to the Moon. She also starred in telefilms such as The Invaders, In the Line of Duty: Ambush in Waco and A Woman Scorned: The Betty Broderick Story.
Her feature film credits include Big with Tom Hanks, Death Becomes Her and Sgt. Bilko. Rupp's theatrical credits include the Broadway hit "Cat on a Hot Tin Roof", in which she portrayed Mae. Off-Broadway, she has performed in "Frankie and Johnny" and "A Girl's Guide to Chaos," which showcased her comic ingenuity and initially brought her to Los Angeles.
Rupp starred in a theater production of “Noises Off” at the Cape Playhouse in Massachusetts. She has also filmed a co-starring role in the independent feature “Spymate” as well as a co-starring role in the ensemble feature “Jackson,” which was written, directed and executive-produced by JF Lawton (scribe of Pretty Woman and Under Siege).
She has also lent her voice to the animated feature Teacher’s Pet, based on the animated children’s series.
Rupp was born in Glendale, CA, and raised in Boston. After moving to New York City, she began to work in theater, television and film. Rupp currently resides in Los Angeles.