When graduating from either Los Angeles High School of the Arts inside 1995, DuVall landed bit television and film roles. Her number one major role was inside 1998's The Faculty. She has since been around films like 21 Grams and The Grudge.

From either 2003 to 2005, DuVall starred as Sofie on the HBO series Carnivale.

Filmography
Two Weeks (2005) - Katrina The Grudge (2004) - Jennifer Williams 21 Grams (2003) - Claudia Identity (2003) - Giny The Slaughter Rule (2002) - Skyla The Laramie Project (2002) - Amanda Gronich Thirteen Conversations About One Thing (2001) - Beatrice "Bea" Ghosts of Mars (2001) - Bashira Kincaid See Jane Run (2001) - Jane Bear to the Right (2000) - Waitress Committed (2000) - Mimi Girl, Interrupted (1999) - Georgina Tuskin ''But I'm a Cheerleader (1999) - Graham Eaton The Astronaut's Wife (1999) - Nan Sleeping Beauties (1999) - Clea Wildflowers (1999) - Cally She's All That (1999) - Misty A Slipping-Down Life (1999) - Nurse The Faculty'' (1998) - Stokely 'Stokes' Mitchell ''Can't Hardly Wait (1998) -Jana Girl (1998) - Gillian How to Make the Cruelest Month (1998) - Bell Bryant Life During Wartime (1997) - Suzy Niagara, Niagara (1997) - Convenience Store Clerk Little Witches (1996)

Television
Helter Skelter (2004) - Linda Kasabian Carnivàle (2003) - Sofie How to Make a Monster (2001) - Laura Wheeler The Fugitive (2001) - Lynette Hennessey Popular (2000) - Wanda Rickets The Defenders: Payback (1997) - Jessica Lane Buffy the Vampire Slayer (1997) - Marcie Ross On the Edge of Innocence (1997) - Ann Crisis Center (1997) - Teen ER (1997) - Karen Reed Dangerous Minds'' (1996) - Nina

Trivia

Clea practices Tae Kwon Do.

Clea has worked sustaining director James Mangold on two occasions, around 1999's Girl Interrupted & 2003's Identity.

Quotes

''"People are kinda seeing that it is okay to just be attracted to a person and not so much a body. For some people, that is more (honest) than just "homosexual" or "straight." I think there is an in-between. I think bisexuality is frowned upon for a lot of different reasons. But I don't like any of those words. I don't like any of those labels. I think they're limiting."

"I'm an only child and I'm just a real loner kind of person, and yeah, kinda dark. But I'm happy. Not sad. I'm just shy and nervous."''