Kathryn Felicia Day (born on June 28, 1979) 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. Day is also the star, script writer and producer of the original web series The Guild, a show loosely based on her life as a gamer. She also starred in the Dragon Age Web Series; Dragon Age: Redemption, which she wrote. She is a member of the Board of Directors of the International Academy of Web Television.