Jim Carrey is now a Grandpa!!

Premiere of 20th Century Fox's "Horton Hears a Who!" - Arrivals

Aww, how cute is that! Jim Carrey’s daughter gave birth to a baby boy on Friday!

He may seem a little young to be called “Grandpa,” but 47-year-old Jim Carrey is embracing his new role now that daughter Jane Carrey has given birth to a baby boy.

Jane and husband Alex Santana welcomed their first child, son Jackson Riley Santana, at 12:28 a.m. Friday in Los Angeles, PEOPLE confirms. He weighed in at 7 lbs., 11 oz, and measured 20 inches long.

Tweeting about the new arrival, the proud new granddad posted a baby pic and wrote, “Jackson Riley Santana, My Grandson, Born today! This is what 7lbs.11oz. of Calfornia dynomite looks like!”