"Both mother and baby are healthy and doing well," Bilson's rep shared, according to People.
This is the first child for the couple, who met on the set of "Jumper" and started dating in 2008. Bilson is currently the star of "The Hart of Dixie," but she's best known for her role as Summer Roberts on "The O.C." Christensen is best known for his role as Anakin Skywalker/Darth Vader from the "Star Wars" prequels.
Congratulations to the young couple!