Elizabeth Mitchell is an American actress. She is best known for her lead role as Juliet Burke on the ABC mystery drama series Lost (2006–2010), for which she received a Primetime Emmy Award nomination. Mitchell also had lead roles on the television series V (2009–2010), Revolution (2012–2014), Dead of Summer (2016), and The Santa Clauses (2022–present). She had recurring roles on the television series ER (2000–2001), Once Upon a Time (2014), The Expanse, and Outer Banks (2021–present).

Dr. Juliet Burke is a character portrayed by Elizabeth Mitchell on the ABC television series Lost. Created by J. J. Abrams and Damon Lindelof, the character was introduced in the third season as a member of the hostile group referred to as "the Others" by the crash survivors of Oceanic Flight 815. Flashbacks reveal Juliet's past as a research specialist recruited to solve the Island's fertility problem where pregnant women die after conception. Prevented from leaving the Island and seeing her sister again by Ben Linus until she finds a solution, she quickly betrays Ben and the Others when she is sent as a spy to the survivors' camp. Juliet initially grows close to the castaways' leader, Jack Shephard, but ultimately falls in love and forms a relationship with James "Sawyer" Ford, with whom she moves on to the afterlife in the series finale. The character has also appeared in several spin-off webisodes of Lost: Missing Pieces, with Mitchell reprising her role.