Prince William Good Genes or Good Docs?

5/19/2018 12:10 AM PDT

Prince William -- Good Genes or Good Docs?

Prince William's good looks are truly royal!

Here's a 17-year-old version of the Duke of Cambridge back in 1999 (left) and, 19 years later, the now-35-year-old heir to the throne taking a stroll around Windsor Castle the day before his little brother's big wedding day (right).

I do!

The question is ...