Jim Carrey Shows Off New Grandson

Check out this pic the actor just posted hours after becoming a grandfather for the first time!

To call Jim Carrey a proud grandpa is probably an understatement.

Less than 24 hours after the arrival of his daughter's little bundle of joy, Jackson, the actor eagerly shared with the world this adorable pic of the kid via Twitter.

"Jackson Riley Santana, My Grandson, Born today! This is what 7lbs.11oz. of California dynomite looks like! %^>," he wrote.

Forget dumb and dumber. This is a case of cute and cuter!