Sarah Lancaster
Jean Baptiste Lacroix/WireImage
The Chuck star, 31, who wed attorney Matthew Jacobs earlier this year in Southern California, delivered a son on June 29, her rep confirms to PEOPLE.
Oliver Michael Jacobs was born in Los Angeles, weighing in at 8 lbs., 7 oz.
"We feel so fortunate for every minute we get to spend with our healthy and happy baby," the couple tell PEOPLE.
Lancaster plays Ellie on NBC's action comedy spy series, which is back for its fifth season on Oct. 21.
• Reporting by JULIE JORDAN
