Jim Carrey Becomes a Grandfather!

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, 22, and husband Alex Santana welcomed their first child, son Jackson Riley Santana, at 12:28 a.m. Friday, Feb. 26 in Los Angeles, PEOPLE confirms. He weighed in at 7 lbs., 11 oz. and measured 20 inches long.

While she was pregnant, the Jane Carrey Band singer, 22, said she was looking forward to having a son with Alex, lead singer of the rock group Blood Money.

“I’m excited about it because I never really got along with girls growing up,” Jane said last year. “I was a little afraid that if it was a girl that she would not like me, you know? So I’m very happy about the boy.”

Her actor dad predicted his little girl would do just fine as a parent.

“Jane is going to be a great mom,” he said in July when his daughter announced the pregnancy.

Jane’s due date was Mar. 3. Click here to see a photo of Jackson tweeted by Jim.

— Catherine Donaldson-Evans and Oliver Jones

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