Directed by Dario Argento Written by Dario Argento   Luigi Cozzi   Mario Foglietti   Giorgio Piferi   Cast Michael Brandon ... Roberto Tobias Mimsy Farmer ... Nina Tobias Jean-Pierre Marielle ... Gianni Arrosio (as Jean Pierre Marielle) Aldo Bufi Landi ... Pathologist Calisto Calisti ... Carlo Marosi Marisa Fabbri ... Amelia, the Maid Oreste Lionello ... The Professor Fabrizio Moroni ... Mirko Corrado Olmi ... Porter Stefano Satta Flores ... Andrea Laura Troschel ... Maria (as Costanza Spada) Francine Racette ... Dalia Bud Spencer ... Diomede / Godfrey Dante Cleri ... Coffin Salesman Guerrino Crivello ... Rambaldi, the Neighbor Gildo Di Marco ... Postman Tom Felleghy ... Police Commissioner Pini Leopoldo Migliori ... Musician Fulvio Mingozzi ... Music Studio Manager Stefano Oppedisano ... Bearded guy with girlfriend Pino Patti ... Funeral Exhibition Attendant Ada Pometti ... Extra (credit only) Jacques Stany ... Psychiatrist Uncredited Cast Fortunato Cecilia ... Funeral Exhibition Visitor Franz Colangeli ... Funeral Exhibition Visitor Shirley Corrigan ... Girl at Party Luigi Cozzi ... Masked Killer in Theater Giovanni Di Benedetto ... Funeral Exhibition Attendant Sandro Dori ... Funeral Exhibition Attendant Renzo Marignano ... Funeral Exhibition Attendant Quinto Marziale ... Funeral Exhibition Visitor Diego Morreale ... Extra Anna Maria Perego ... Delia's Mother Pupita Lea Scuderoni ... Funeral Exhibition Visitor Maurizio Streccioni ... Funeral Exhibition Visitor Produced by Salvatore Argento   Original Music by Ennio Morricone

Additional Info Premiere: December 17, 1971 Theatrical Release: August 25, 1972 DVD Release: February 24, 2009 Countries: Distributor: Mya Communication Websites: Alternate Titles 4 Mosche Di Velluto Grigio The Four Velvet Flies Production Companies Seda Spettacoli (SEDA Spettacoli, Rome) (produced for) Universal Productions France (Universal Prod. France, Paris) (produced for) Distributors Paramount Pictures   (1972) (United States) (dubbed) (theatrical) Silver Star Video Entertainment   (1982) (United States) (VHS) Mya Communication   (2009) (United States) (DVD) Ryko Distribution   (2009) (United States) (DVD) Malastrana Film Series   (2015) (United States) (presents) (theatrical) Anthology Film Archives   (2015) (United States) (theatrical) Severin Films   (2022) (World-wide) (Ultra HD Blu-ray) (limited edition 4x disc set) Rating Stats Overall Rating 6.5 / 10 Our Rating 5.0 / 10 Your Friends -- / 10 Male Users 5.0 / 10 Female Users -- / 10 Site Ranking #4,618 / 20,718 Ratings Breakdown Average 1 total rating Site Ranking #4,614 Grease Live! (2016) #4,615 Street Fighter II: The Animated Movie (1994) #4,616 The Batman Superman Movie: World's Finest (1997) #4,617 Made In Italy (2020) #4,618 Four Flies On Grey Velvet (1971) #4,619 Big Top Pee-Wee (1988) #4,620 House Of D (2004) #4,621 Todd McFarlane's Spawn: Season 3 (1999) #4,622 Todd McFarlane's Spawn: Season 1 (1997)