The hotly anticipated adaptation will see War and Peace actor Tom Burke star as private eye Cormoran Strike

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J.K. Rowling and Tom Burke

Filming for a TV adaptation of J.K. Rowling’s crime novels has begun in London.

The Cuckoo’s Calling, penned under Rowling’s pseudonym Robert Gailbraith, became a huge bestseller after the Harry Potter writer was unmasked as the author.

Now the BBC are adapting the book and its follow-up, The Silkworm, into a TV drama.

War and Peace actor Tom Burke, 35, will play small-screen detective Cormoran Strike, who features in both books.

The story is about a war veteran turned private detective operating out of a tiny office in London’s Denmark Street.

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JK Rowling’s crime novels became huge bestsellers after she was unmasked as the author

Holliday Grainger will play the private eye’s assistant, Robin Ellacott, in the hotly anticipated series.

The 28-year-old previously appeared on the big screen in Lady Chatterley’s Lover and The Riot Club.

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Holliday Grainger as Robin Ellacott and Tom Burke as Cormoran Strike in The Strike Series for the BBC

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Tom Burke previously starred in the BBC adaptation of War and Peace

And the first pictures from the set show that filming for The Cuckoo’s Calling has begun on the streets of London.

The news that J.K. Rowling’s works were to be turned into a TV series was met with joy when she revealed the plans in 2014.

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Tom Burke starred as Dolokhov in the BBC drama War and Peace

She tweeted the news, writing: “My friend @RGalbraith’s first novel is going to be a TV drama on @BBCOne.

“He’s very excited, but expressing it with characteristic silence.”

The shows will be produced by Bronte Film and TV, who worked on the BBC drama of Rowling’s novel The Casual Vacancy.

Filming of The Cuckoo’s Calling has fallen at a very busy time of year for the Harry Potter writer.

She is reportedly currently working on a new novel, and recently revealed plans to bring her West End play, Harry Potter And The Cursed Child, to Broadway.

Her latest film, Fantastic Beasts and Where to Find Them, starring Eddie Redmayne, will also be released at the end of the month.

Fans are also in a frenzy after the author hinted that Dumbledore will be openly gay in the sequel.

J.K. Rowling chooses her new Dumbledore for Fantastic Beasts and Where to Find Them

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Eddie Redmayne stars in Fantastic Beasts and Where to Find Them

Director David Yates has confirmed that a young Albus will be making an appearance in the upcoming movie and screenwriter Rowling fuelled the rumour mill about his sexuality at a recent press conference.

She said: “As far as his sexuality is concerned … Watch this space.”

The author spoke about Dumbledore’s sexuality in 2007, saying: “I always thought of Dumbledore as gay.

Fantastic Beasts And Where To Find Them is released in UK cinemas on November 18th.