Liliane Rudabet Gloria Elsveta Sobieski (born June 10, 1983 some sources say 1982), known professionally as Leelee Sobieski, is an American film and television actress. Sobieski achieved recognition in her mid-teens for her performance in the 1998 film Deep Impact. She received an Emmynomination for the 1999 TV movie Joan of Arc, and two Golden Globe nominations for Joan of Arc and the movie Uprising.

Sobieski was born in New York City. Her mother, Elizabeth Sobieski (née Salomon), is an American film producer and screenwriter who also works as Sobieski's manager, and her father, Jean Sobieski, is a French painter and former actor. Sobieski has a younger brother, Robert.

Sobieski's first name, "Liliane", was the name of her paternal grandmother. One of her middle names, "Elsveta", is derived from "Elżbieta", which is the Polishequivalent of "Elizabeth". Her father is of Polish and Swiss ancestry. Her maternal grandfather, United States Navy captain Robert Salomon, was Jewish, and Sobieski grew up in a "pan-religious" family; she has said that she is "proud of [her] Jewish roots". She graduated from Trevor Day School in 2001 and studied literature and fine art at Brown University.