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PICTURE EXCLUSIVE: Tamsin Egerton and Josh Hartnett confirm the arrival of their first child as he follows her out of the hospital carrying the newborn

Josh Hartnett and Tamsin Egerton were pictured leaving London's St Mary's Hospital on Monday after welcoming their first child.

The actors, who have been an item since 2012, are thought to have become first-time parents in the final days of November after announcing their pregnancy in July.

New father Josh, 37, took an early lead on daddy duties and was seen following 27-year-old girlfriend Tamsin with the baby carrier.

British beauty Tamsin maintained her signature stylish air, stepping out in patterned trousers and dainty slipper shoes.

The make-up free model-turned-movie-star, still radiant with her hair scraped away from her face, shrouded her shape with an oversized cardigan while carrying a designer handbag in one hand.

Her overnight bag was carried for her by a protective Josh as he similarly made sure that the newborn was tended to and drove the vehicle for the four-piece.

Handsome US star Josh - famed for such films as Pearl Harbour and 40 Days And 40 Nights - cut a distinguished figure in thick-rimmed spectacles with new silver flecks to his hair.

Still stylish: The British model cut a stylish figure, walking solo in sleek slipper shoes and bright trousers

Casual: Model Tamsin was still radiant with her hair scraped away from her face

Happy family: Doting dad Josh followed Tamsin's lead out of the hospital

A light, patterned pink blanket seemed to cover the baby as Josh put his new parenting skills into practise with Tamsin looking on.

The couple are yet to confirm whether they have welcomed a boy or a girl as they remained schtum on the sex they were expecting when the news was announced earlier this year.

Josh and Tamsin are thought to have met on the set of The Lovers in 2010 but reportedly didn't become an item item until 2012's Singularity, where they starred opposite each other again, and have remained notoriously private about their relationship since.

Cute twosome: The duo confirmed that they were expecting back in July this year

Distinguished: The actor, who's biggest roles have included Pearl Harbour and 40 Days And 40 Nights, looked more distinguished than usual

Speaking to USA Today in May this year, Josh explained: 'I purposefully didn't want people to know too much about my personal life because I think a lot of people give it away for free.

'I think if you spend too much time courting people's attention into your personal life, you lose your ownership of it.

'That's why I make sure my life is my own. I was not a dumb kid. I was a little bit wary of this business. I saw what it could do to people pretty quickly.'

Josh has previously been linked to Hollywood actresses Scarlett Johansson, Amanda Seyfried and Mischa Barton.

Meanwhile, Tamsin has previously insisted that Josh is one of only three boyfriends she's had, telling Daily Mail in 2013 that she's 'not interested in serial dating; I’d honestly rather be single.'

New family: It's their first addition to the family, though they've remained quiet about whether they were expecting a girl or a boy

Protective: While she carried just her handbag, he kept a watchful eye over the child

First outing: Tamsin appeared to be in the company of her mother, who toted her overnight bag

Model proportions: The model-turned-actress did well to meet her boyfriend's height

Show of support: Her overnight bag was carried for her as she walked to the car

Not ready: At the time of the news, Tamsin and Josh were said to be 'beyond thrilled' but she said only six months previously that she was not yet ready to start a family

Family outing: Josh lead his girlfriend into the Lindo wing that day

When news leaked of the pregnancy, the pair were said to be 'beyond thrilled,' despite Tamsin telling MailOnline in October 2014 that she was not yet ready for a family.

Asked about expecting children, she said: 'Not yet... I'm 25! I want to stay travelling and working as much as possible'

She claimed at the time that 'love life is great,' as she promoted her most recent part in romantic comedy Love, Rosie, in which she starred alongside Sam Claflin and Lily Collins.

Clearly a natural on the paternal instincts front, Josh was quick to mention that he was considering investing in a sensible car before news broke in April.

He told Playboy: 'I have to get a car that's safe for my kid. I don't have a kid yet, but that's the idea coming into my head these days. I don’t have a kid yet, but that’s the idea coming into my head these days'

New three piece: The pair looked relaxed in the early stages of becoming first-time parents

Like ducks to water: Josh seemed to have all of the paternal instincts in hand

Comfort: The duo were both comfortable in flat shoes, making it a low-key affair

Heading home: It appeared to be the first time that the couple were heading home as a family

Thrilled: Josh and Tamsin are a notoriously private couple, owing to their high profile statuses

Helping hand: It appeared to be Tamsin's mother who was helping them with the outing

New parents: The duo made their first public appearance since the announcement when they attended the Wimbledon Championships later in July

Famous exes: While she maintains that Josh is one of only three boyfriends she's hand, Josh has previously dated Mischa Barton and Amanda Seyfried

Yet to confirm: The couple first met in 2011 but it's believed they have been an item since 2012

Safety first: Josh has previously described investing in a safe car that could be practical for carrying a child

PICTURE EXCLUSIVE: Tamsin Egerton and Josh Hartnett confirm the arrival of their first child as he follows her out of the hospital carrying the newborn

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