The couple, who have been together since 2006, married last fall. E! News said Thursday their son, Spike, was born two weeks ago.
"He is healthy and his parents are ecstatic," Myers' representative told the entertainment news Web site.
No other details about the baby's birth were immediately reported.
Myers is a former cast member of "Saturday Night Live." He is also known for his "Shrek," "Austin Powers" and "Wayne's World" movies.