castable
(ˈkɑːstəbəl) adj1. able to be cast; suitable for casting
2. (Theatre) (of an actor) able or likely to be selected to play a part in a play, film, etc
3. (Film) (of an actor) able or likely to be selected to play a part in a play, film, etc
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014