He's the famous filmmaker who has interviewed porn stars, plastic surgeons and neo-Nazis.

However, Louis Theroux has now revealed that plans for a documentary examining British jihadists and supporters of ISIS has fallen through.

In an interview published in The Daily Telegraph on Sunday, the 47-year-old star is quoted as saying: 'It had become such a hot button topic that we were competing with other crews to get access.'

'They were very wary': In an interview published in The Daily Telegraph on Sunday, Louis Theroux revealed that plans to film a documentary on British ISIS supporters fell through

Louis also added there was another reason why the documentary failed to get off the ground, citing a lack of interviewees willing to speak on camera.

'The terror supporters were so under pressure that they were very wary,' he told the publication.

Louis and his producers focused on the idea for 'a couple of months' before it was scrapped.

'The terror supporters were so under pressure that they were very wary': Louis scrapped plans for the documentary (pictured: police after the Westminster terror attack in March 2017)

'It had become such a hot button topic': Louis will now turn his attention to subjects in the US (pictured: police after the Westminster terror attack in March 2017)

The star- who is the first cousin of Jennifer Aniston's husband Justin Theroux- has now turned his attention back to the United States, where he has already filmed dozens of documentaries.

Earlier this year, BBC revealed they will screen three new films featuring Louis in the US.

The filmmaker will travel to Wisconsin to examine race relations, before he turns to Texas to tackle the subject of sex trafficking.

New documentaries: BBC revealed Louis will feature in three new films examining issues in America

The Oxford-educated star will then look at opioid addiction across America.

Speaking of the upcoming documentaries, Louis told the Telegraph, 'What I find is there are people reaching out to me to try and convey something'.

The British TV favourite married his long-term love Nancy Strang in 2012, and the couple share three sons- Albert, Walter and Frederick.