Downton Abbey's Allen Leech and Benedict Cumberbatch's niece Emily Peacock visit the star on the set of Marvel flick Doctor Strange in NYC

They co-starred in the Oscar-winning Immitaion Game, famously getting on together.

So it was little surprise that Allen Leech decided to drop-by and visit his friend Benedict Cumberbatch on the set of his latest film, Doctor Strange, while he was in New York on Saturday.

Arriving on the latest Marvel film's set in Manhattan with Benedict's niece, Emily Peacock, the 38-year-old actor cut a casual figure as he dropped by to say hello to the film's leading man.

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Dropping by: Allen Leech decided to drop-by and visit his friend Benedict Cumberbatch on the set of his latest film, Doctor Strange, while he was in New York  on Saturday - along with the Marvel star's niece

Dropping by: Allen Leech decided to drop-by and visit his friend Benedict Cumberbatch on the set of his latest film, Doctor Strange, while he was in New York  on Saturday - along with the Marvel star's niece

Apparently nonplussed by the busy crew and cast scattered all over the street - where scenes for an epic action scene were being shot - the Downton Abbey star and his companion cut a relaxed pair.

Strolling along side-by-side, Allen looked at ease in the company of the pretty blonde, and the pair chatted away in an animated fashion.

Clearly enjoying some downtime after wrapping up filming on his first post-Downton feature, Hunter's Prayer, the chiseled actor cut a very casual figure.

Opting for a dress-down look the award-winning actor opted to wear a brown leather jacket over a simple grey tee.

A long way from Branson: Arriving on the latest Marvel film's set in Manhattan, the 38-year-old actor cut a casual figure as he dropped by to say hello to the film's leading man

A long way from Branson: Arriving on the latest Marvel film's set in Manhattan, the 38-year-old actor cut a casual figure as he dropped by to say hello to the film's leading man

He rounded his casual look off with a smart flourish, wearing a pair of crisp black chinos and a pair of tan brogues.

And clearly having long forgotten about his Downton character Tom Branson's clean-cut image, the star added a rugged edge to his look with a smattering of stubble.

His pretty blonde companion had also opted for a casual yet smart look, Donned a belted mid-length navy overcoat, skinny denim jeans and a pair of jazzy slip on trainers 

Clearly feeling the chill in the air, she wore a voluminous leopard-print scarf underneath her jacket.

She looked well-prepared for the excursion, as she carried a multitude of bag and a trusty umbrella to combat the city's changeable  spring weather.

The pair were later seen chatting away to Benedict as he held court in-between takes, in full-costume.

Dressed from head-to-toe as Doctor Steven Strange, the titular hero of the marvel film, the 39-year-old actor had clearly done his research when it came to the sorcerer comic book hero.

MailOnline has contacted a representative of Allen's for comment. 

An old friend: The pair were later seen chatting away to Benedict as he held court in-between takes, in full-costume

An old friend: The pair were later seen chatting away to Benedict as he held court in-between takes, in full-costume

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