Nicole de Boer is a Canadian actress. She is best known for starring in the cult film Cube as Joan Leaven, playing Ezri Dax on the final season of Star Trek: Deep Space Nine (1998–1999), and as Sarah Bannerman on the series The Dead Zone (2002–2007). From 2016 to 2021, she had a recurring role as Becca Dorsay, ex-wife of one of the series leads on the Canadian-produced crime drama Private Eyes.

Cube is a 1997 Canadian science fiction horror-thriller film directed and co-written by Vincenzo Natali. A product of the Canadian Film Centre's First Feature Project, Nicole de Boer, Nicky Guadagni, David Hewlett, Andrew Miller, Julian Richings, Wayne Robson, and Maurice Dean Wint star as individuals trapped in a bizarre and deadly labyrinth of cube-shaped rooms.