well the answer is, they aren't. Although many celebrities are actors and actresses not much of the actors and actresses are famous. for instance, very few theatre actors become famous. if you are a film actor your chances are higher but still slim. If they want to be famous many singers/actors/ect turn to tabloids to get them famous. Though, the reason they are famous other than that is mainly that if people like them they will win awards or be asked to be in more well-known films and people will become used to seeing their name or photograph.
Ray Mala
The cast of How to Be Famous - 2011 includes: Sirle von Schihver
The cast of I Am Famous - 2007 includes: Aastha Tyagi as Minnu
Elinor Hughes has written: 'Famous Stars of Filmdom' 'Famous stars of filmdom (women)' -- subject(s): Actresses, Biography, Motion picture actors and actresses, Motion pictures 'Famous stars of filmdon (women)' -- subject(s): Motion picture actors and actresses
The cast of Famous - 1994 includes: Darin Cooper as Prison Guard
The cast of Anonymously Famous - 2011 includes: Lonnie Hughes
The cast of World Famous - 2010 includes: Mikayla Park as Lead
The cast of Relatively Famous - 2004 includes: Jawn Murray as himself
The cast of Almost Famous - 2008 includes: Alex Zane as Voiceover
They might....But no one really knows.
charlie chaplin marilyn monroe cantiflas
One can find a list of famous actors from the following sources; iMDb's list of most talked actors of 2012, Forbes' Celebrity 100, and listal's American actors and actresses.