Ginnifer Goodwin and Josh Dallas

Snow White is going to be a mom!

Once Upon a Time co-stars Ginnifer Goodwin and Josh Dallas are expecting their first child, their rep told People magazine.

The news comes a month after the couple announced their engagement. "It's true! The bun is baking away! Thanks for the outpouring of love & congrats!" Goodwin tweeted Tuesday.

Though there's no official word yet, Goodwin's pregnancy will likely be written into Once, as Snow White (Goodwin) and Prince Charming (Dallas) are discussing having another baby.

Goodwin, 35, and Dallas, 31, met on the set of the ABC series and took their relationship public in 2012.

Once Upon a Time airs on Sundays at 8/7c on ABC.