"Chad and Sarah are extremely happy and excited, and enjoying their life together," his rep told Us Weekly on Tuesday.
This will be Murray and Roemer's first child.
The Crackle TV actor, 33, and the actress, 30, were first linked in 2014. Though few details about the nuptials were made available, just last week the private star explained why to E! News.
"I'm a romantic. I'm a family guy. I want that core," he said. "I tend to keep everything quiet. I love my life. That's the part that I keep for myself."
Murray seems to have a thing for on-set romance: It's the second time tying the knot for the actor, who was married to his "OTH" costar Sophia Bush for about a year, then engaged to "OTH" guest star Kenzie Dalton for seven years. He reportedly split with Australian actress Nicky Whelan last spring after dating for six months. They'd worked together on "Chosen" and "Left Behind."