Emily Blunt and John Krasinski announce the birth of their second daughter

The couple have been married since 2010

The Krasinski brood has just become a little bigger!

Actors Emily Blunt and husband John Krasinski have confirmed that they've welcomed their second child into the world, making them a family of four.

John broke the happy news on his Twitter account on Independence Day, writing to his 1.16 million followers, 'What better way to celebrate the 4th... than to announce our 4th family member!!! 2 weeks ago we met our beautiful daughter Violet #Happy4th'

The pair are already parents to 2-year-old daughter Hazel, who arrived in February 2014, three years after the couple tied the knot.

Emily and John became parents in 2014, when their first daughter Hazel was born

John and Emily started dating in November 2008, and became engaged less than a year later, in August 2009. In July 2010, the Devil Wears Prada star said 'I do' to John in a romantic ceremony in Como, Italy.

The 36-year-old father, who became famous for his role in the American version of The Office, has previously spoken out about how parenthood has changed him, admitting he went through a sort of 'existential crisis' after the birth of his first daughter.

Speaking to PEOPLE magazine, he said: 'I went through some really serious stuff. There is a mirror that is held up to me now. You have someone watching you. You have to lead by example.'

'I got to understand my parents better. I got to understand my wife better', he said of Emily. 'I got to understand how lucky I am to be in the fox hole with someone I can rely on 150 percent.'

The couple have tried to keep their daughter's life as private as possible, but they do sometimes give fans snippets of information about the tot.

Just recently, John revealed that now Hazel's starting to speak, she's picking up Emily's British accent.

'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', the proud father said.

The couple have been together for seven years

He also gushed over his wife during an appearance on the Jonathan Ross Show last week, joking he had to bulk up to earn her.

'Yes I married Emily - I know what you're thinking, "What?! That guy got her?" It's true, it's true. Why do you think I bulked up? I had to earn it!', he said, in reference to a picture of him on set of his new film, 13 Hours: The Secret Soldiers of Benghazi.

But apparently his wife wasn't that impressed with his new physique, as he also said: 'She hates it! She would way prefer to have doughy guy back... like, sweet faced.'

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