It very hard to become a cast member of SNL (obviously). You cannot just go audition. You have to be suggested by someone who already has an "in" to get an audition. Usually people who get to this point are already in sketch troupes, or are comics, or have gained some sort of notoriety in some other form of comedy.
To become a member of Saturday Night Live (SNL), one typically needs to audition for the show by submitting a reel or performing stand-up comedy. SNL holds open auditions at various times and locations. Being hired for SNL also requires strong comedic skills, writing abilities, and improvisational talent.
you become famous
Sam Rockwell was never an SNL cast member.
by being on snl
You could shop more or be a member.
Bill Murray
Brad Hall
Bill Murray
Janet Reno
Former SNL cast member Chris Parnell is in the movie Answer This.
Gilda Radner
you have to verify your dragonfable,but you must be a member
Phil Hartman
Mad TV