Emilie was born on 27th December 1981, and grew up in Mount Eliza, Victoria, Australia. When she was 15, she was accepted at the highly selective Australian Ballet School in Melbourne. However, after only a year, she dropped out and undertook acting courses.

Her first starring role was on the fantasy drama, BeastMaster. When her agent told her of a role in the US, as newcomer Tess in the hit series Roswell, she flew out and auditioned. After landing the role, she was written out of BeastMaster and started work as "Tess", an alien. She relocated to California and was on Roswell before she even owned an apartment.

After 2 years on the show, she then made notable guest appearances in CSI: Miami and The Handler.

She stayed in TV, playing the bad girl Chris in Carrie, a movie made for TV. She also changed genres, starring in Santa's Slay, a black comedy.

Emilie has shown her versatility by branching out into film, making her debut at Sundance 2005 with the the award-winning indie film Brick. She starred in the remake The Hills Have Eyes in 2006, which debuted at No.1 in the UK box office.

She is now on the Emmy-award winning ABC series Lost, playing "Claire", a young Australian who gave birth on the mysterious island and has a close relationship with heroin-addict "Charlie", played by Dominic Monaghan.

Despite filming in Hawaii, Emilie lives in California with her pet dog, Bella. In 2007 she separated from husband Josh Janowitz.

In her spare time, she enjoys painting, shopping and exercising.
Emilie has two older sisters. Emilie studied acting at the National Institute of Dramatic Art in Australia (NIDA), and with the Prime Time Actors Studio in Los Angeles. Emilie studied ballet since the age of 9 and at the age of 15, she was accepted into the highly selective Australian Ballet School. She performed in productions of the Australian Ballet Company as well as Danceworld 301. Emilie has a dog named "Bella" Did a workshop at the prestigious Australian drama school, NIDA. Became engaged to actor Josh Janowicz on 1 January 2005 while they visited her family back in Australia for the holidays. In Roswell she played an alien who gets pregnant and leaves the earth before the pregnancy is visible. In Lost she plays girl who is near the end of her pregnancy. In Brick she plays a girl murdered in her third month of her pregnancy. Named #47 on the Maxim magazine Hot 100 of 2005 list. She is Australian and is of French and British heritage. Named #65 on Maxim magazines "Hot 100" list of 2006 Her paternal great great grandparents were French. They immigrated to Australia. "De Ravin" means "from (the) ravine" in French. Her wedding dress was designed by Monique Lhuillier Has starred in two remakes, Carrie and The Hills Have Eyes.