More spurs are set to jingle as Jeff Fahey, Michael Madsen, Bill Pullman, Jobeth Williams and Mare Winningham join the cast of the upcoming Warner Bros. six-gun pic “Wyatt Earp,” the studio announced Wednesday.

They hitch up with Kevin Costner, who stars as Earp, and Dennis Quaid, who portrays his O.K. Corral sidekick Doc Holliday (Daily Variety, May 6).

Lawrence Kasdan, who also directed Costner in oater “Silverado,” helms this outing, which starts lensing in Santa Fe, N.M., on July 19. “Earp” is planned for a 1994 summer release.

Fahey, who was seen in “Lawnmower Man” and “White Hunter, Black Heart,” plays Ike Clanton. Madsen, who portrayed a sadistic thug in Quentin Tarantino’s “Reservoir Dogs” and is also featured in the upcoming WB feature “Free Willy,” plays Earp’s brother, Virgil.

Pullman, whose credits include the upcoming “Sleepless in Seattle” and “Sommersby,” is Ed Masterson. Williams, who was also seen in “Poltergeist” and “The Big Chill,” will play Bessie Earp, the wife of eldest brother James. Winningham, star of “St. Elmo’s Fire” and “Turner and Hooch,” portrays Wyatt Earp’s common-law wife, Mattie. More casting is expected soon.

Costner and his Tig Prods. partner Jim Wilson will produce the pic with Kasdan from a script by Kasdan and Dan Gordon. Gordon and Jon Slan, chairman and CEO of Paragon Entertainment, will exec produce in association with Kasdan Pictures and Paragon. Michael Grillo and Charles Okun will also exec produce.

“Tombstone,” another Earp film, is currently shooting in Tucson for release by Hollywood Pix.