The couple, who play Snow White and Prince Charming on Once, are expecting their second child together, People reports.
So, will Storybrooke be getting a new resident? It's unknown whether Goodwin's pregnancy will be written into the show.
Goodwin, 37, and Dallas, 33, were married in April 2014 after meeting on the set of Once Upon a Time. The new baby will join big brother Oliver Finlay, who was born in May 2014. Earlier this year, Dallas described Goodwin to People as "the greatest mother that I know."