VPC / WENN 1 / 4

Actress Majandra Delfino has become a second-time mother after welcoming a baby boy with her husband David Walton.

RELATED: Kristin Cavallari pregnant with her second child

The "Roswell" beauty and actor Walton, who are already parents to a daughter named Cecilia, welcomed baby Louis in Los Angeles last week, a month before his due date.

RELATED: Celebs without makeup

Walton tells People.com, "Louis is as healthy as can be ... We couldn't be happier with our very early Christmas gift."

RELATED: Kerry Washington is bombarded with ever-louder baby talk

The actors married in Miami, Florida in 2011 and welcomed 17-month-old Cecilia in June last year.