US TV
ABC
Her alter-ego was last seen during the show's fourth season when she mysteriously disappeared, leaving her baby behind. She has since been referenced and has been confirmed as a series regular on season six.
Speaking to TV Guide, De Ravin said that she has filmed lots of scenes with Evangeline Lilly and added: "I think I'm alive, as far as I know."
The 28-year-old actress has previously teased that she will make a return in an "unexpected" way.
Lost returns for its sixth and final season Tuesday, February 2 on ABC in the US and Friday, February 5 on Sky1 in the UK.
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2012-13 Season
'Hangover' star in Glee creator's comedyJustin Bartha is to star in a new comedy pilot by the co-creator of Glee.
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'The Bachelor's Emily O'Brien - interviewPhD student failed to get a rose at this week's Rose Ceremony in Belize.
US TV Ratings
'Glee's latest episode climbs to 7.2mBut CBS manages to win the night with its combination of NCIS and Unforgettable.
