Bert Fields, the dean of Hollywood lawyers whose services were called on by superstars and studios alike, died on August 7 at his home in Malibu. He was 93.

Over the decades, stars and studio heads who turned to Mr. Fields included Madonna, Tom Cruise, Warren Beatty, the Beatles, Michael Jackson, Dustin Hoffman, George Lucas, Steven Spielberg, Michael Ovitz, and Jeffrey Katzenberg.

Early in his career, Mr. Fields did some acting, appearing as a prosecutor in an episode of the TV police drama “Dragnet”; Jack Webb, the show’s creator and star, was a client. Soon he acquired other clients — Edward G. Robinson, Peter Falk, and Elaine May. In 1982, Mr. Fields merged his firm with another to become the entertainment powerhouse Greenberg Glusker Fields Claman & Machtinger. He also wrote three books about Shakespeare and two mystery novels under the pseudonym D. Kincaid.