Sean Maguire [1] is going to be a dad again! The Once Upon a Time [2] actor subtly revealed the exciting news [3] when he tweeted at Lin-Manuel Miranda [4], writing, "Dear @Lin_Manuel my brother & I have babies on the way.Listening to dear theodosia tearing up. Thanks for writing what we couldn't articulate." On Thursday, his wife, Tanya Flynn, confirmed that she is expecting [5] by posting an adorable photo of the couple's 1-year-old son, Flynn, with big puppy-dog eyes, writing, "This ones just heard that he's getting a baby brother for Christmas...." Naturally, OUAT fans couldn't help but flood the English actor's notifications with happy tweets. His costar Colin O'Donoghue, who recently welcomed his second child [6], even offered his congratulations.