The couple found out the happy news on Gallagher's 34th birthday in January, only two months after they tied the knot in Las Vegas. "We took the test together," Hilty told the magazine. "It was the best present he got this year -- or any other year for that matter!"
The expectant parents, who met while working on Broadway, haven't shopped for baby things yet, but they're already busy serenading their child. "The baby's gonna be really sick of our voices by the time it arrives!" Hilty joked.
Hilty, 33, most recently starred on the short-lived NBC sitcom Sean Saves the World.