One Direction fan fiction After will soon be a 'Fifty Shades-type' movie

Harry Styles is the basis for Jane Austen-loving 'rude boy' student Hardin

Harry Styles is the focus of After, written by 25-year-old Anna Todd (Rex Features)

As if designed to calm One Direction fans after their unnecessary distress this morning (those nightmare break-up rumours), news has broken of an upcoming movie about the boys based on fan fiction.

Anne Todd's book series After is being touted as a "Fifty Shades-type story for a younger generation" and Mom writer Susan McMartin is on board to pen the script, according to The Hollywood Reporter.

There are instant comparisons to EL James' erotic novels, which were themselves inspired by Twilight fan fiction.

Todd's lead character Tessa Young is a naive student similar to Anastasia Steele from Fifty Shades of Grey, who falls in love with a brooding, hard-to-read man.

But the similarities end there, as instead of BDSM-loving billionaire Christian Grey, Tessa falls for her Jane Austen-loving "rude boy" classmate Hardin, who is based on, you guessed it, One Direction singer Harry Styles. Fear not, Tessa goes on to meet Harry's pals Liam, Louis, Niall and *sob* Zayn.

After, first published on free story website Wattpad, comes with a message warning that it contains "detailed sexual scenes and tons of explicit language", as well as "loads and loads of typos".

More than one billion people read After online and it was published last October, followed by sequels After We Collided, After We Fell and After Ever Happy.

Todd tweeted news that a screenwriter had been found for After earlier today, but the release date is yet to be confirmed.