Being an English actress and writer, Rebecca Mader is best known for her roles as Charlotte Lewis in the ABC series Lost, and as Zelena, the Wicked Witch of the West, on ABC's Once Upon a Time. She has made number of guest appearances on television shows such as Justice, ABC series Lost, No Ordinary Family, Fringe and ABC comedy series Work It. In 2009, she was nominated Golden Nymph for Outstanding Actress - drama series Lost (2004).
Born in 1977 in Cambridge, England, Mader worked as a model in New York City for a year, appearing in adverts for L'Oréal, Colgate and Wella Hair. She landed on her television career the first time on the ABC daytime soap operas All My Children as Morgan Gordon, and One Life to Live as Maegaret Cochran.
Mader was previously married to Joseph Arongino, but they separated in 2007. Afterthat, she announced her engagement to Marcus Kayne on December 29, 2014 via her Twitter account.