The Harry Potter alum, 33, and The Marvelous Mrs. Maisel star, 38, welcomed their first baby together.
A rep for the actor confirmed the exciting news following an early morning report published by The Daily Mail on Tuesday, which included photos of the two actors while out for a stroll in New York City showing Radcliffe pushing a stroller.
No other details about the infant were immediately made available, but we're happy to see that mom and baby look to be doing great!
The two actors, who have been together for about a decade, first met on the set of their 2013 movie Kill Your Darlings, in which Radcliffe portrayed Allen Ginsberg and Darke played his love interest, Gwendolyn. The following year, Radcliffe told Parade that he and Darke "just got on immediately."
"It was one of those instant things where you’re like, ‘Oh, I really like this person,'" he said. "You just have a connection with somebody, and then suddenly it’s incredibly easy to talk to them. It was one of those sort of situations."
The couple has kept a majority of their relationship private, but Radcliffe has been known to publicly gush about his partner on occasion. "You want [the person you're in a relationship with] to be your best friend," he once told Us Weekly. "In the case of Erin, we definitely are."
Congratulations to the new parents!