A-list actor is unrecognisable as he is aged by decades with prosthetics in behind-the-scenes snaps from hit drama - but can YOU guess who it is?

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An A-list actor looked completely unrecognisable in behind-the-scenes snaps from filming which were shared on Instagram on Thursday. 

The hit series has just been renewed for a second season after three million watched it in the first week. 

The show follows the British star, 42, take on the lead role and have to use a variety of disguises and aliases. 

One photo from the make-up chair, showed the actor looking worlds away from his usual looks after spending hours getting facial prosthetics done. 

The Hollywood star's trademark strawberry blond hair was replaced with a bald cap while the special effects team worked hard to age him by decades with the addition of wrinkles.

But can YOU guess who it is? 

An A-list actor looked completely unrecognisable in behind-the-scenes snaps which were shared on Instagram on Thursday 

That's right! It's Eddie Redmayne. 

Sky TV shared behind-the-scenes snaps from The Day Of The Jackal filming. 

The partially true story, which is based on Frederick Forsyth's 1971 book of the same name, stars Eddie Redmayne as the assassin being targeted by an intelligence officer, played by Lashana Lynch.

Other photos included Eddie on set with Money Heist's Ursula Corbero, 35, who plays Nuria, the Jackal's Spanish wife who knows him as 'Charles Calthrop'. 

Lashana, 37, who portrays Bianca Pullman, a MI6 agent and a firearms expert also posed for some snaps, including one with Eddie, who had aged into an old man with the help of a white wig, spectacles and a tweed coat. 

Fans wrote: 'The best series of this year' and 'The best actors and the best series!!' 

After a stellar start, the future certainly is bright for the thrilling series as it's been green-lit for another stint on screens.

The series, which is based on the Frederick Forsyth novel of the same name, stars Eddie Redmayne [pictured] as the assassin being targeted by an intelligence officer

One photo included Eddie on set with Money Heist's Ursula Corbero, 35, who plays Nuria, the Jackal's Spanish wife who knows him as 'Charles Calthrop'

The good news comes amid season one's incredible start, which saw it become the 'biggest' Sky Original ever, while also being the broadcaster's biggest launch in over two years, garnering a record audience of 3million in its first week.

The Day Of The Jackal has also broken global records too, with the show seeing the 'biggest ever debut for a UK Sky Original' in Sky Group markets Italy, Germany, Austria, Switzerland and Ireland.

Meanwhile, across the pond in the United States, the series has been ranked number one on Peacock’s Top 10 TV Shows.

While, according to preliminary Nielsen data, The Day Of The Jackal was a Top 5 streaming original in the US for its opening weekend.

The success of the show continued in Australia, where further records were smashed.

The partially true story, which is based on Frederick Forsyth 's 1971 book of the same name, stars Lashana Lynch

Lashana, 37, who portrays Bianca Pullman, a MI6 agent and a firearms expert also posed for some snaps, including one with Eddie, who had a aged into an old man

Fans wrote: 'The best series of this year' and 'The best actors and the best series!!'

The actor, 42, portrays 'the Jackal' an internationally renowned assassin who utilises a variety of disguises and aliases

Eddie was on a stunt horse for one scene 

One camera shot showed Lashana laughing in-between takes 

Ursala waved to the cameras as she filmed scenes in an open top car 

After a stellar start, the future certainly is bright for the thrilling series as it's been green-lit for another stint on screens

The show is the broadcaster's biggest launch in over two years, garnering a record audience of 3million in its first week [Lashana pictured]

Industry insiders say the budget for the series is set at a whopping £100million, with Oscar-winner Eddie bagging £10million overall for his role as the titular character, according to The Mirror. 

A source said: 'Many TV companies and broadcasters are struggling with budgets being squeezed but not with high-end drama for a global audience involving the streamers.

'If you can do a deal with one of them, you can absolutely break the bank.'

MailOnline contacted representatives of Eddie for comment. 

Most fans won't know the partially true story behind the nail-biting reboot, based on Frederick's 1971 book of the same name. 

In the original novel, the dissident parliamentary group planned to assassinate the President of France at the time - Charles de Gaulle, which is also a real plot that unfolded.

The group's motive was to stop Algeria from becoming independent from French rule, which was something the President was planning a referendum on in 1961.

In the book, their initial attempts to assassinate him were based on real life, however, everything that follows is fictional.