"I think they're going to get married," Romo's close friend of three years, Michael Starr, says in the latest issue of Us Weekly, on newsstands now.
Starr's prediction comes on top of Romo's former fling Sophia Bush telling Us, "I think they could go the distance.
"They're perfect for each other," the actress, a mutual friend of Romo and Simpson, added. "They're both funny and wonderful and kind. I'm rooting for them."