So as of this moment all except one character now has a voice actor.

The characters with a voice actor being:
William Afton
Henry Miller
Fredbear
Spring Bonnie

The last character in the casting call is a female character who will appear quite rarely, so if you are a female voice actress then please audition for this character.

Link to the Casting Call: https://www.castingcall.club/projects/five-nights-at-the-freakshow-before-the-show