Stephanie Leonidas is an English actress best known for her starring role as Irisa Nyira, an Irathient warrior who is Nolan's adopted daughter and Deputy Lawkeeper, in the science fiction television series Defiance.
Leonidas is known for her many television appearances, including Whitechapel, Eternal Law and the BBC's Dracula, as well as the award winning ITV film for television Wall of Silence.
Other film credits include the lead role of Helena in David McKean's Mirrormask, Luis Llosa's feature film Feast of the Goat, Ben Sombogaart's Crusade in Jeans: A March through Time, Luna and Andrew Douglas' U Want Me To Kill Him.
Stephanie has also appeared on stage in the lead role of Dani in Marianne Elliott's The Sugar Syndrome at the Royal Court, receiving rave reviews.
She also portrayed Adela in Gadi Roll's House of Bernarda Alba.
Her brother is actor Dimitri Leonidas.