Chad Michael Murray -- Good Genes or Good Docs?!

Chad Michael Murray's looks over the years are 'FREAKY'-HOT!

Here is a 21-year-old version of the blonde hair hottie in a shot from "Freaky Friday" back in 2003 (left). This was the same year he played Lucas Scott on "One Tree Hill" and of course, went on to play Austin Aimes alongside Hilary Duff in the 2004 film "A Cinderella Story."

And, more than two decades later, the sizllin' zaddy of three brought his long hair back to life for the sequel film, "Freakier Friday" (right) -- which premiered earlier this weekend, starring Lindsay Lohan and Jamie Lee Curtis.

Mr. Murray has put up some macho, masculine looks on the red carpet over the years, but the imperative question here is: Good Genes or Good Docs?!