This is an extremely hard question....you know him only سے طرف کی his فلمیں and interviews. آپ don't really know him...He's rich enough to buy basically anything. I'm living overseas in Asia so I think I would bring him something from there. Something that he can't really buy in the US
I'd gift him a بھیڑیا for his birthday. They're loyal, fearsome, magnificent, and mystic creatures. Personally, I cannot resist them - I hope Johnny likes them! If he doesn't (many people are scared of them), then it would be a pity. I'd take back the present, saying I'll give him something better for his اگلے birthday.
The real سوال is: What do آپ get someone, who آپ admire, who could get anything he wanted himself at anytime. I tried to look this سوال up. No Luck. All I can think of since I am one of his many شائقین of his tv/movie career, etc., is something that I treasure most in my life. A پسندیدہ picture nicely framed, یا a پسندیدہ recipe that you've made thousands of times and it's been woven into your mind, heart, & soul.