Share 'Ethan and Lena'

I can honestly say that I don't agree with the casts for Ethan and Lena...I think Ethan should be played by Josh Hutcherson from Journey 2 or whatever he's in. I'm not exactly sure about Lena. I feel like hes tall...n looks like a kid...he can look either 16 or 17 depending on what he's doing...does anyone else think so?