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Stephanie Leonidas (born 14th February 1984 in Westminster, London) is an English actress of Greek descent. She began acting in community theater at age eight, and at age nine began to act in television. She has appeared in the shows ''Daddy's Girl'' and ''Night And Day'', and is best known as the star of ''Film/MirrorMask''. She acts in film, television, and stage productions. She also starred in the Creator/{{Syfy}} show ''Series/{{Defiance}}'' as Irisa Nyira, an alien warrior who is the deputy and adopted daughter of Chief Lawkeeper Jeb Nolan.

Her brother Dimitri Leonidas and sister Creator/GeorginaLeonidas also act. She is married to fellow actor Robert Boulter, and they have one child together.

!!Roles
* ''Series/DownToEarth2000'' (2000 episode "Best Beloved") as Chrissie
* ''Series/HolbyCity'' (2001 episode "Runaway") as Sarah Newman
* ''Series/NightAndDay'' (2001-2003) as Della Wells
* ''Daddy's Girl'' (2002) as Emma Cooper
* ''Fogbound'' (2002) as Annette, age 16
* ''[[Theatre/LaCasaDeBernardaAlba The House of Bernarda Alba]]'' as Adela
* ''Series/TheBill'' (2003 episode) as Kirsty Sullivan
* ''Danielle Cable Eyewitness'' (2003) as Kerry
* ''The Sugar Syndrome'' (2003 production) as Dani
* ''Series/DocMartin'' (2004 episode "Of All the Harbours in All the Towns") as Melanie
* ''Rose And Maloney'' (2004 episode) as Katie Phelan
* ''Waiting'' (2004 short) as Tawny
* ''Wall of Silence'' (2004) as Tracy Broughton
* ''Film/{{Yes}}'' (2004) as Grace
* ''Beneath The Skin'' (2005) as Zoe Haratounian
* ''Series/{{Empire}}'' (2005) as Girlfriend Olivia
* ''Feast Of The Goat'' (2005) as Uranita
* ''Film/MirrorMask'' (2005) as Helena
* ''Series/{{Revelations}}'' (2005) as Athena
* ''Brief Encounters'' (2006 episode "One Night in White Satin") as Jay
* ''Crusade in Jeans'' (2006) as Jenne
* ''Film/Dracula2006'' as Mina Murray
* ''Agatha Christie's Series/{{Marple}}'' (2007 episode "Ordeal by Innocence") as Hester Argyle
* ''Film/AtlantisEndOfAWorldBirthOfALegend'' (2011) as Pinaruti
* ''How to Stop Being a Loser'' (2011) as Patch
* ''Luna'' (2011) as Fraya
* ''Series/{{Defiance}}'' (2013) as Irisa
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