Photo ExclusivePatrick Dempsey Debuts His Twins!

TWO BUNDLES OF JOY

Patrick Dempsey is one proud papa as he cuddles new twin sons Sullivan Patrick and Darby Galen. Born Feb. 1 at an L.A.-area hospital, the boys made their debut with some help from dad, whose role as Dr. Derek "McDreamy" Shepherd on Grey's Anatomy came in handy. "I was watching everything that was going on (with the doctors), and you see a lot of that in the show," says Dempsey, who helped cut the cords – both of them!

For more on Patrick Dempsey's twins, pick up the latest issue of PEOPLE, on newsstands Friday.