The Watchmen star signed up to portray the iconic character last April. He will be taking over the role that Robert Englund played for eight movies in the franchise.
Haley told Sci-Fi Wire: "[Krueger's] got a new look going [on]. We're still true with the fedora, the sweater and the glove, but the mug is a little bit more based in reality."
The 48-year-old continued: "Our approach was to make him a little more serious. He's a little less jokey."
He also admitted that he is open to reprise the role should the remake of the 1984 Wes Craven classic prove profitable.
Haley added: "I've signed on to do a couple more, but it needs to be successful before they do that."
A Nightmare on Elm Street opens in cinemas on April 16, 2010.