Blunt and Krasinski are already mum and dad to Hazel Krasinski, who they welcomed in February of 2014. The pair have been married since July 2010.
"She is talking. She's talking a lot," he said. "She's starting to do little bits, which is hilarious. Like if she's looking for me instead of saying, 'Daddy, Daddy,' she says, 'Where is that daddy?' And she's starting to pick up on Emily's accent."
Blunt and Krasinski are yet to reveal if they are expecting a boy or girl.
Congratulations to the famous parents.
TAP and scroll through the gallery for photos of Emily and John's beautiful home...