According to Amazon's The Boys co-creator Eric Kripke, Garth Ennis offers input on every script for the TV series.
When asked by a Reddit user how closely he worked with Ennis on the series, Kripke replied, "He reads every script." Kripke went onto the describe the importance Ennis felt for getting the character of Butcher right, saying, "He gives me notes -- but 95 percent of those notes are on Butcher's dialogue. Which I'm more than happy to take. He really loves Butcher and feels strongly about getting him right, which is great with me!"
Billy Butcher is the leader of The Boys in both the comic and television series. He is played by Karl Urban, who has also appeared in 2013's Star Trek Into Darkness, 2016's Stark Trek Beyond and 2017's Thor: Ragnarok.
Ennis co-created Dynamite Entertainment's The Boys comic series with Darick Robertson. The series first debuted in October 2006 and ran for 72 issues. He is probably best known for co-creating the Vertigo comic series Preacher. He also penned a popular Hellblazer run in the early 90s and has written for many Marvel and DC Comics series.
The Boys stars Karl Urban as Billy Butcher, Jack Quaid as Hughie, Laz Alonso as Mother's Milk, Tomer Kapon as Frenchie, Karen Fukuhara as the Female, Erin Moriarty as Annie January, Chace Crawford as the Deep, Antony Starr as Homelander and Simon Pegg as Hughie's dad.