Alicia Roanne Witt (born August 21, 1975) is an American film, stage and television actress who can currently be seen on the series Law & Order: Criminal Intent.

Alicia made her film debut in David Lynch (I)'s Dune (1984) and, by the age of fourteen, received her high school diploma and moved to Los Angeles, California, to pursue acting full time. Once she was in Los Angeles, Lynch cast her in his Emmy Award-winning cult classic television series "Twin Peaks" (1990) as Gersten Hayward, a part written specifically for her. Following this, Lynch utilized Alicia's talents once again in his HBO trilogy "Hotel Room" (1993), in which she portrayed a young woman with multiple personality disorder. Alicia appeared in Mr. Holland's Opus (1995) opposite Richard Dreyfuss as well as in Four Rooms (1995) (Miramax/Buena Vista) with Tim Roth, Madonna (I) Ciccone, and Lili Taylor (I), which was directed by Quentin Tarantino, Allison Anders, Robert Rodriguez (I), and Alexandre Rockwell. In 1994, Witt appeared in the critically acclaimed Fun (1994), which debuted at the Sundance Film Festival. The film, directed by Rafal Zielinski, depicts two disturbed young girls whose quest for fun leads them to murder. Witt received the Special Jury Recognition Award at Sundance and a nomination for an Independent Spirit Award. Other credits include Mike Figgis's Liebestraum (1991) starring Kevin Anderson (I), Bodies, Rest & Motion (1993) starring Tim Roth and Bridget Fonda, and Bongwater (1997) opposite Luke Wilson (I). She combined her acting talents with her skills as a classically trained pianist in the romantic comedy Playing Mona Lisa (2000). For this role, Alicia won a Best Actress Award at the U.S. Comedy Arts Festival. Alicia has made guest appearances on the phenomenally successful HBO series "Sopranos, The" (1999) and the Emmy Award-winning "Ally McBeal" (1997). In 1998, Alicia starred in Columbia Tristar's hit movie Urban Legend (1998). Witt's home for four years was CBS, where she starred as Zoey, Cybill Shepherd's quirky daughter with a dark side, on the sitcom "Cybill" (1995) (Carsey-Werner). More recently, Witt was in Upside of Anger, The (2005) opposite Kevin Costner and Joan Allen (I) and in Ring of the Nibelungs (2004) (TV), which was shot in South Africa. She was last seen starring in the Warner Bros. romantic comedy Two Weeks Notice (2002) opposite Hugh Grant (I) and Sandra Bullock. She was also seen in the John Waters (I) film Cecil B. DeMented (2000) starring Stephen Dorff and Melanie Griffith. Alicia also made a cameo in the independent film American Girl (2002/I).