Jane Espenson (born 14 July 1964) is an American scriptwriter and television producer best known for her work on TV series produced by Joss Whedon and Ronald D. Moore, as well as other projects. She has worked alongside Whedon on Buffy the Vampire Slayer, Angel, Firefly and Dollhouse, and Moore on Star Trek:Deep Space Nine, Battlestar Galactica and its spin-off Caprica. She has also worked on Gilmore Girls, The OC and is the co-creator of Warehouse 13. She won a Hugo Award for her Buffy episode Conversations with Dead People.
She joined the crew of ABC series Once Upon a Time as a co-executive producer and writer for the first season in fall 2011. The show was renewed for a second season and she remains part of the staff, precluding further work on the third season of Game of Thrones.