"They're thrilled and Lars is adorable," a source told People. "Their family is all around them and Mel is over the moon. They're home and everybody is healthy and happy!"
This is 61-year-old Gibson's ninth child as has seven children with ex-wife Robyn Denise Moore named Hannah, Edward, Christian, William, Louis, Milo, Thomas, and a daughter named Lucia with ex-girlfriend Oksana Grigorieva.
A source close to the family told People, "Mel loves being a dad, and he and Rose can't wait to be parents together,” adding, "The last two years have been some of his happiest years he's ever had."
Congrats to Mel and Rosalind!