The 32-year-old actress and her husband John Krasinski, 36, will welcome their second child later this year, a representative for Emily confirmed to Us Weekly.
Emily and John, who tied the knot in Italy in 2010 after two years of dating, already have a daughter Hazel, 23 months.
Speaking about Hazel recently, John revealed she is picking up her mother's English accent.
He said: "She is talking. She's talking a lot. 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."
And becoming a parent has taught John a lot about the people around him.
He said: "I got to understand my parents better. I got to understand my wife better.
"I got to understand how lucky I am to be in the fox hole with someone I can rely on 150 per cent."
John also credits Hazel with making him a better actor and director when he began working on 'The Hollars', in which he plays a father-to-be whose mother falls ill.
He said: "I had my daughter in February and then we shot the movie that April.
"Those four months changed my life. They are the reason the movie is what it is."
Story: ©BANG Showbiz. Photo: Michael Buckner/Variety/REX Shutterstock