who were the actors ?
Jeff Bridges, Julianne Moore, Steve Buscemi are a few of them
The Big Lebowski
It stars Jeff Bridges as Jeffrey "The Dude" Lebowski, a Los Angeles slacker and avid bowler. He is assaulted as a result of mistaken identity, then learns that a millionaire (also named Jeffrey Lebowski) was the intended victim. The millionaire Lebowski's trophy wife is kidnapped, and he commissions The Dude to deliver the ransom to secure her release; the plan goes awry when the Dude's friend Walter Sobchak (John Goodman) schemes to keep the ransom money. Julianne Moore, Steve Buscemi, David Huddleston, John Turturro and Philip Seymour Hoffman also appear, in supporting roles.

what kind of bowling ball does the dude use UNANSWERABLE what is "the big lebowski"? It is a crime comedy film what is the storyline? In 1991 Los Angeles, Jeffrey "The Dude" Lebowski, a middle-aged bachelor with a penchant for cannabis and bowling, is assaulted by two goons hired by pornographer Jackie Treehorn, demanding money owed by the wife of another Jeffrey Lebowski (the eponymous "Big Lebowski"). One urinates on the Dude's rug. Eventually, realizing they have the wrong man, they leave.
wiki:19615544
The Big Lebowski [SEP] Introduction
The film is loosely inspired by the work of Raymond Chandler. Joel Coen stated, "We wanted to do a Chandler kind of story – how it moves episodically, and deals with the characters trying to unravel a mystery, as well as having a hopelessly complex plot that's ultimately unimportant." The original score was composed by Carter Burwell, a longtime collaborator of the Coen brothers. "The Big Lebowski" received mixed reviews at the time of its release. Over time, reviews have become largely positive, and the film has become a cult favorite, noted for its eccentric characters, comedic dream sequences, idiosyncratic dialogue, and eclectic soundtrack.