Nicole de Boer, born December 20, 1970, in Toronto, Ontario, Canada, is a Canadian actress best known for portraying Ezri Dax in Star Trek: Deep Space Nine and Sarah Bannerman in The Dead Zone. She has also starred in Cube, Private Eyes, and The Outer Limits.

     De Boer began acting as a child, making her television debut in Freddy the Freeloader's Christmas Dinner, starring Red Skelton and Vincent Price. She later appeared in The Kids in the Hall, Beyond Reality, PSI Factor, and Mission Genesis. Her breakout film role came in Cube (1997), a cult sci-fi thriller.

     In 1998, she was cast as Ezri Dax, replacing Terry Farrell in Deep Space Nine’s final season. She later starred in The Dead Zone (2002–2007) and guest-starred in Stargate Atlantis, Haven, and Private Eyes. She has also worked in Canadian television and independent films.

     De Boer was married to John Kastner (1999–2012), and they have one child.