Pratt, 35, who has a two-year-old son, said if his character from the superhero film inspires kids, it will give him more happiness than any success, reported Contactmusic.
"Right now, it means high profile, cool jobs coming up, big press tour, and all the excitement of it all. But none of that really means anything.
"The coolest things would be that my son can one day see this, and that maybe I can go affect some kids in a positive way' be a good role model for them," he said.
"I stole the jacket and some of the wardrobe so that, if this movie comes out and does what everyone hopes it can, I can follow the example of someone and go visit kids.
"If it was a big enough movie, to where it would mean something to a kid who's sick in the hospital, for Peter Quill or Star-Lord to come visit them, I'll do that. That would give me real meaning for this movie," he added.