Jim Carrey has now crossed over to grandparenthood. His daughter, Jane, and her husband, Alex Santana had a baby boy February 26th. Jackson Riley Santana was due March 3rd, but was born a few days early in Los Angeles on Friday. He weighed 7lb 11oz and measured 20 inches. At 47, Jim Carrey is a pretty young grandpa, but I bet he will be a cool grandpa. Can you imagine having Jim Carrey as your grandpa? I am sure Carey has his dull moment like everyone else, but little Jackson is going to be cracking-up all the time.