Adorable, of course.
Prince William had several starring role's in royal weddings when he was younger, too, and the photos prove that George is every bit his father's mini-me.
Back in 1988, William wore a similar style of outfit in a pink colour-scheme at the wedding of Camilla Dunnes. Take a look at the two photos below and tell us they're not identical:
Will might be a little older in that photo, but the resemblance is uncanny.
The Prince also fulfilled pageboy duties at the royal wedding of his uncle Prince Andrew and Sarah Ferguson, in a sailor-inspired outfit, no less. Will looks exactly like his young son in photos from the day, which were taken 31 years earlier.