Missy Yager and Sam Trammell
08/11/2011 at 08:00 AM EDT
The True Blood twins
Sam Trammell and longtime love Missy Yager welcomed "two healthy baby boys" on Tuesday, his rep confirms to PEOPLE.
After meeting in New York doing theater, the pair has been together for eight years.
Yager, 43, has appeared on Mad Men
and Boston Public
, while Trammell, 42, currently plays Sam Merlotte on the HBO vampire series.
Reporting by BLAINE ZUCKERMAN