You may be discovered on the street, this is true, but not very many actors are discovered just by sitting around and wanting. This is why it is your job to take things into your own hands. There are casting calls all over the world. You should be able to find one near you if not more. Your first audition may be a flop, but you should never stop trying. Once casting directors become familiar with your face, if they like you, they will remember you. However, thousands of women audition at one casting call so you need to make sure you find a way to stand out in their minds.
Auditions for theatre
are much different from auditions for movies or television. With a
theatre audition, you usually will be asked to prepare your own
monologue and a song. Make sure to have those prepared and know them so
well you look natural when reading for the casting director. On
occasion, you may be asked to do a cold reading. You will be given a
script and you may have to act with another person or perform a
monologue depending on what they are looking for from you.
A screen test is used for movie auditions and television auditions
once you have gotten past the initial casting call. Depending on what
they are casting for, they may ask you to read lines on the spot, they
may ask you to perform a monologue or they may give you a small scene
when you come in to the audition. As the choices for a part are
narrowed down, they may call you back numerous times before contacting
you about signing a contract.
When you are auditioning, always remember to make every word count. If
you miss a beat, or seem off, the casting director will know this and
will be less likely to consider you for the part as a result.