If someone asks you to pay to be a movie extra, refuse and run as fast as you can.
The studios pay you to work, not the other way around (although there are times when casting directors are seeking unpaid extras). Do not pay anyone to be an extra in "Warrior," the movie that will start shooting in Pittsburgh in April.
You can find the information on this blog about how to apply, and Lissa Brennan, extras casting director hired by Lionsgate, will have a table at the job fair at Mellon Arena March 24 from 10 a.m. to 2 p.m.
Remember, they pay you, not the other way around!