"I’m very shy,” O’Brien says. “I wish more people believed me when I say that. Stiles is a version of me that rarely exists in the real world. He’s so confident and extroverted, and I’m much more restrained and internal.”
"After wrapping Guardians of the Galaxy I was very homesick and I was coming home to my wife and my son, who at the time was 13 months old. My wife told me ‘Hey, listen there’s a chance he may not recognize you and he may be a little shy’ and so I came in there, and he just sat right up and had this big smile on his face. He started saying ‘Daddy, daddy, daddy!’ and I just started to cry. He saw the tears in my eyes and started doing bits to make me laugh and that just made me cry more."