Howler: Attack of the Shadow Army

 is an American animated direct-to-video supernatural-comedy film based on Howler. It is directed by TBD and has released on October 4, 2011.

Voice cast

 * Charlie Schlatter (Jeffrey) and Kevin Michael Richardson (Howler) as Jeffrey Morrison/Howler
 * Jennifer Hale as Bella Stoker
 * Jeff Bennett as George
 * Kat Cressida as Georgia
 * John DiMaggio as Frank N. Stein
 * Doug Lawrence as Greg
 * Dee Bradley Baker (vocal effects) as Lex
 * Kimberly Brooks as Wylda
 * Keith Ferguson as Zachariah
 * Nika Futterman as Zoey
 * Ashley Johnson as Kris
 * Lacey Chabert as Kloe
 * Bumper Robinson as Phillip
 * Mae Whitman as Lacey
 * Robin Atkin Downes as Shadow Howler
 * TBD as Shadow Bella
 * TBD as Shadow George
 * TBD as Shadow Georgia
 * TBD as Shadow Frank
 * TBD as Shadow Greg
 * TBD as Shadow Lex
 * Keith David as the Nightstalker

Trivia

 * It would later premiere on Cartoon Network on May 25, 2012, 7 months after its release on DVD and Blu-Ray.