Lol it's a mature hairline, chill. No two mature hairlines are the same (can vary from flatter Norwood 1, 1.5, 2 and also retain the central childhood remnant - widow's peak). Another thing that gives it away that it's mature is he has zero hair loss elsewhere, symmetrical thick hairline. His temple peaks are also not parallel, the guy is not balding or every so microscopically. He has a good head of hair.
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Have a look here. The top crease reaches the widow's peak to show that's his childhood intact remnant which didn't mature. The corners can be higher 1 to 1.5 inches from the top crease depending on the person. I'm sure he's on finasteride though as a precaution and why not as an actor. May help against age related thinning too who knows. He wasn't balding all this time (decades) like you think but that doesn't mean he won't get some mild thinning later.