Felicia Day returning to 'Supernatural'

Felicia Day is reprising her role as Charlie for an upcoming episode of the CW’s Supernatural, the actress announced Wednesday.

Day, known for her web series, The Guild, posted a picture to her Twitter on Wednesday of a trailer with the name Charlie on the door and asked if her fans could guess where she was that day.

She later posted:

You guessed right!!! What better place to be on Halloween than on the set of #Supernatural?Charlie’s back! :)

— Felicia Day (@feliciaday) October 31, 2012

Day played Charlie Bradbury during the season 7 episode “The Girl with the Dungeons and Dragons Tattoo.” Charlie is a computer hacker who quickly became a fan favorite.

Zap2It confirms Day will appear in episode 11, "LARP and The Real Girl." The episode will also feature a character named Gerard who is very passionate about a medieval-style game.

Executive producer Jeremy Carver says: "We will be doing an episode that deals pretty heavily with the LARPing universe, different in a way that we've dealt with in the past."

LARP stands for live action role-playing, in which people dress up and act like characters from a game. Supernatural touched on the subject of LARPing before in the season 5 episode “The Real Ghostbusters,” in which Sam and Dean attended a convention.

Supernatural airs Wednesdays at 9 p.m. ET on the CW.