I heard a line in the movie [The Humbling](https://en.wikipedia.org/wiki/The_Humbling_(film)):

> 
> Pegeen: We're doing a contemporary adaptation of Macbeth, and I cannot think of another actor. I'd like to try it out on **more than you**.
> 
> 
> 

I can't figure out why the character said **more than you**. I would understand it if the line was *I'd like to try it out on you* (which means "I'd like to have you try the role") But what does the character mean by **more than you**?