The cast has been established, we only need someone to voice  the main character, Will. He's a funny, charismatic, adventurous and energetic boy. If you can provide a voice that sounds lively and animated but still down to earth and not overly cartoony, then that's the kind of voice I'm looking for. Any gender can audition for this role as long as you can sound like a tween boy. It doesn't matter if your voice is high or deep, the perfect voice is not about the pitch but the voice acting and tone itself. I'm happiest with a voice that sounds memorable, like if the viewer shut their eyes, can they tell that Will is talking? Thank you! 

Reference: https://www.youtube.com/watch?v=MzosFGuNhyM