"Bachelorette" couple Ashley Hebert and J.P. Rosenbaum expecting first child

There's a "Bachelorette" baby on board.

"I'm a little nervous, but we're very excited," Hebert, who is three months along and due in October, told the magazine. "I've wanted a child for a while."

Added Rosenbaum, "It's nice not to have to keep a secret anymore. We're beyond thrilled."