“Mum’s the word” in more ways than one for actress Sarah Lancaster. The 31-year-old star of NBC’s hit televisions how “Chuck” has been keeping the birth of her son under wraps since the end of June!

Lancaster and her husband, attorney Matthew Jacobs, welcomed an 8 lb, 7 oz little boy on June 29th. The couple named the baby Oliver Michael Jacobs.

“We feel so fortunate for every minute we get to spend with our healthy and happy baby,” the couple told PEOPLE.

Jacobs and Lancaster were married in February in a small ceremony in Southern California.