He may not look old enough to be one, but Jim Carrey is now a proud grandfather.
![Jim Carrey and his grandson](https://www.celebrific.com/wp-content/uploads/2010/03/Jim-Carrey-and-his-grandson-570x761.jpg)
Last Friday the 48-year-old actor tweeted: “Jackson Riley Santana, My Grandson, Born today! This is what 7lbs.11oz. of Calfornia dynomite looks like! %^> http://twitpic.com/15liwi”
The link shows a photo of a sleeping baby boy wrapped in a blanket while wearing a beanie. How cute!
Jackson Riley was born in Los Angeles to Jane Carrey Santana, Jim’s one and only daughter from his first marriage to Melissa Womer.
Congratulations!