Mad Men's Kevin Rahm is a first time dad! Credit: Courtesy Kevin Rahm

Mad Men's Kevin Rahm is a dad! The 43-year old actor and his wife Amy Lonkar, a cardiothoracic surgeon, have welcomed their baby daughter into the world.

Rahm, who plays Ted Chaough, Peggy Olson's love interest in the hit AMC series, shared an adorable snap of him and his new baby girl snuggling up, via Twitter on Sunday, Sept. 14.

"My new favorite Human," the proud dad wrote. "Thank you @UCDavisChildren for your amazing staff and excellent care."

Their daughter’s life already has a strong Twitter tradition! Rahm and Lonkar, who married in 2012, also took to the social network to announce the news they were expecting a baby back in April, creating a cute movie-poster-style announcement.

And as fans and friends responded to congratulate the daddy-to-be, he admitted he was suffering some first-time nerves! "So excited and terrified," he wrote.