The 73-year-old actor still feels young and says seeing pictures of himself looking old surprise him as he doesn't picture himself that way, reported Female First.
"Every birthday's a big thing. There's a certain shock to it. I'm in here, and then I'll see a picture of myself and, you know, I'm old. And stuff happens. My hands get sore," he said.
"The hair helps. And also I think that I have pretty good genes [Christopher's mother died at 104 and his father lived to be almost 100].