Besides her acting career, Witt was a contestant on a Teen Week edition of Wheel of Fortune in September 1990.
Roles of her include:
- Dune (1984) as Alia.
- Twin Peaks as Gersten Hayward (3 Episodes).
- Hotel Room as Diane (1 Episode).
- Four Rooms as Kiva.
- Cybill as Zoey Woodbine.
- Urban Legend as Natalie Simon.
- The Sopranos as Amy Safir (1 Episode).
- Ally McBeal as Hope Mercy (2 Episodes).
- Cecil B. Demented as Cherish.
- Two and a Half Men as Dolores Pasternak (1 Episode).
- Friday Night Lights as Cheryl (9 Episodes).
- The Mentalist as Rosalind Harker (3 Episodes).
- Person of Interest as Connie Wyler (1 Episode).
Her roles contain examples of:
- The Cast Show Off: Playing piano on Twin Peaks. (She's a classically trained pianist.)
- Creepy Child: She played Alia Atreides in Dune (1984).
- Dull Surprise: Suffered bouts of it in Urban Legend. To be fair, they were asking her to do something she was incapable of, act afraid.
- Fiery Redhead: Some of hers, such as the adult Gersten in Twin Peaks' third season.