The Pineapple Express star and his wife Gia Ruiz are expecting a baby boy later this year (11).
McBride revealed the news during an appearance on U.S. late night show Conan on Wednesday (06Apr11).
He said, "I got married last October. I wasted zero time - three months later I knocked my wife up... I had never impregnated anyone before, so I didn't really realise what they teach you in health class is actually true - that's all it takes. It's amazing."