LOS ANGELES — Stacy Keach, the veteran actor best known to television audiences as private eye Mike Hammer and to generations of theatergoers as one of the finest classical stage actors of his era, has died at 85.

Keach first broke through in the early 1970s with acclaimed film work, including the title role in "Fat City" and a memorable turn as the wandering cowboy in "The Life and Times of Judge Roy Bean," before finding his signature role in 1984's "Mickey Spillane's Mike Hammer," the hard-boiled detective series that turned him into a bona fide TV star and that he would return to across multiple revivals over the following decades.

Beyond the trench coat and the gravelly voiceover, Keach was widely respected in theater circles as one of the leading American interpreters of Shakespeare, performing major roles including Hamlet, King Lear and Macbeth on stages across the country over a career that spanned more than fifty years. He also built a prolific career as a voice actor and character performer, appearing in everything from "American History X" to numerous audiobook recordings, and earned a Tony nomination for his stage work along the way.

HE GAVE EVERYTHING TO EVERY ROLE, WHETHER IT WAS SHAKESPEARE OR A DETECTIVE SHOW.

Keach's career was not without setbacks — a 1984 cocaine-smuggling arrest in London briefly derailed his momentum — but he rebuilt his reputation in the years that followed, continuing to work steadily in film, television and theater well into his eighties. He remained a familiar presence to younger audiences through supporting roles in prestige television and frequent stage work at Chicago's Goodman Theatre and elsewhere.

Tributes from colleagues and admirers began circulating quickly after news of his death broke, with many in the industry remembering him as a performer equally at home quoting Shakespeare and chasing down killers on a network detective show — a range few actors of his generation could claim. Funeral arrangements had not been announced.