Nicole Evangeline Lilly (born August 3, 1979) is a Canadian actress and author. She came to prominence for her starring role as Kate Austen in the ABC series Lost (2004–10), for which she won a Screen Actors Guild Award and received a Golden Globe Award nomination. She is also known for her roles as Connie James in The Hurt Locker (2008), Bailey Tallet in Real Steel (2011) and Tauriel in The Hobbit film series (2012–14).

In the Marvel Cinematic Universe, she stars as the superhero Hope van Dyne/Wasp in the films Ant-Man (2015) and Ant-Man and the Wasp (2018). She will reprise the role in the upcoming untitled Avengers film (2019).