Leonardo DiCaprio looks over the years will have your HEART GO ON 😍!

Here is a 21-year-old version of the Los Angeles native playing his breakout role — the hunky Jack Dawson in “Titanic” — back in 1997 (left). He went on to star in several blockbuster films including “Inception” and “The Wolf of Wall Street.”

And, nearly three decades later the blue-eyed Hollywood icon displayed a seasoned and scruffy face for his most recent movie “One Battle After Another” (right) which dropped earlier this weekend …

Over the years, Leo’s lent his good looks countless times on the red carpet, but the key question here is: Good Genes or Good Docs?!