Kathryn Felicia Day (born on June 28, 1979 in Huntsville, Alabama) is an American actress, known for her work as “Vi” on the TV series Buffy the Vampire Slayer and for parts in movies such as Bring It On Again and June, as well as the Internet musical, Dr. Horrible’s Sing-Along Blog. She is a member of the Board of Directors of the International Academy of Web Television. An accomplished violinist, Day was accepted to the Juilliard School of Music but chose to attend the University of Texas at Austin on a full scholarship in violin performance. She is an avid player of a wide variety of video game genres. Day is the creator, writer, and star of The Guild, a web series which started airing its fifth season in July 2011. Its second season premiered on Microsoft’s three major video channels Xbox Live, MSN Video and The Zune Marketplace after Microsoft made a deal with The Guild, allowing Day, her cast, and her crew to receive financial remuneration for their work. in July 2008, Day starred as Penny in the three-part web based musical Dr. Horrible’s Sing-Along Blog (created by Joss Whedon, who also created Firefly and Buffy the Vampire Slayer in which Day has a minor role as the potential slayer Vi during the seventh season).