If it's been a while since you've felt way too old, try this on for size: Remember the cute kid with the giant head and even bigger glasses from Tom Cruise's memorable film "Jerry Maguire"? You know, the one who coined the cutest nerdy line to date: "Did you know the human head weighs eight pounds?"
Yeah, so that kid is no longer 6, despite being engraved as such in your brain. Jonathan Lipnicki is, in fact, Jennifer Lawrence's age, which is 23. Mind -- blown.
In related "no way!" news, Kylie Jenner and Elle Fanning are the same age (16) as are Lea Michele and Heidi Montag (27). Nothing beats good genes, not even in Hollywood!
Click on through to see 20 celebrity pairs that share unexpectedly similar birth dates:
ALSO ON HUFFPOST:
Spilling the tea 24/7. Never miss a beat. Learn more