Keegan Connor Tracy (born December 3, 1971) is a Canadian actress. She is best known for her roles as Audrey Malone in the Showtime comedy - drama series Beggars and Choosers (1999 -- 2000), the Blue Fairy in the ABC fantasy series Once Upon a Time (2011 -- 18), Miss Blaire Watson in the A&E drama series Bates Motel (2013 -- 16), and Professor Lipson in the Syfy fantasy series The Magicians (2016 -- 18). Tracy 's other notable work includes roles on the television series Stargate SG - 1, Jake 2.0, The 4400, Psych, Battlestar Galactica, and Supernatural.
who played the blue fairy in once upon a time
Keegan Connor Tracy