Dr. Horrible's Sing-along Blog

Dr. Horrible's Sing-Along Blog is a musical comedy consisting of three acts. It stars Neil Patrick Harris, Felicia Day, Nathan Fillion, and Simon Helberg, and was conceived during the WGA writers' strike. The movie was written by Joss Whedon and his brothers Zack Whedon (a television writer), Jed Whedon (a composer and founding member of The Southland) and Jed’s fiancée, Maurissa Tancharoen (an actress).