Duvall first gained recognition in the independent feature How To Make the Cruelest Month, which was one of 16 films in dramatic competition at the 1998 Sundance Film Festival. Later that same year, her starring role in Dimension's The Faculty garnered her nominations for a Blockbuster and Teen Choice Award for Breakout Performance. Later, she co-starred with Johnny Depp and Charlize Theron in New Line's sci-fi thriller, The Astronaut's Wife. Clea then starred in Fine Line Features' comedy But I'm A Cheerleader, starring opposite Natasha Lyonne and Cathy Moriarty and directed by Jamie Babit, which screened to sold-out crowds at this year's Toronto Film Festival. She also did a cameo role in the Miramax Film Committed with Heather Graham, Casey Affleck and Luke Wilson. She then filmed the dark comedy See Jane Run, in which she plays the title role of Jane. The film, which examines relationships in Los Angeles, is produced by Doug Liman (Go and Swingers). For television, her credits include Showtime's "The Defenders" with Beau Bridges as well as appearances on the series "Dangerous Minds," "ER" and "Buffy, the Vampire Slayer."