Billie Piper and Laurence Fox just welcomed a baby boy!

The proud dad tweeted to his fans, “One born every minute. We had our minute today. Couldn’t be happier. Beautiful boy. Everything fine.”

“Mother and baby are doing extremely well,” a source tells Daily Mail. “Billie and Laurence are thrilled to bits.”

This is the second baby for the couple who has another 3-year-old son, Winston. Congratulations!

Watch the celeb mom’s BBC interview in 2010: