A question about, "actors"

Hi, i am new in the communiy, and i am working on a short film proyect.
The question begin when my partner ask if we can modeling Tobin Bell for the main character. The idea is pretty well because he fit so well in the character, but…, we wouldn’t have problems if the real actor see it?

I saw 2D animations where they used well know actors and nothing happened, but a 3D model almost realistic will be different?

this is it
best regards!