'Watch What Happens Live' host Andy Cohen announces birth of son

Andy Cohen on Monday announced the birth of his first child in a black-and-white photo on Instagram.

"WOW! This is my son, Benjamin Allen Cohen. He is 9 lbs 2 ounces !!" he wrote on Instagram. "20 inches !! Born at 6:35 pm, PT He is named after my grandfather Ben Allen. I'm in love. And speechless. And eternally grateful to an incredible surrogate. And I'm a dad. Wow."

The 50-year-old announced that he was going to be a father in December. He said it happened "after many years of careful deliberation, a fair amount of prayers and the benefit of science."

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Cohen is the executive producer of reality series such as "Real Housewives.” He hosts, “Watch What Happens Live.”

The Associated Press contributed to this report