This video can not be played
Footage shows the blaze at Dalton Mills in Keighley, near Bradford
More than 100 firefighters have been tackling a blaze at a mill complex used as a film location for hit shows such as Peaky Blinders and Downton Abbey.
Fire crews were drafted in to tackle the inferno at Dalton Mills in Dalton Lane, Keighley, West Yorkshire.
West Yorkshire Fire and Rescue Service said 20 pumps were called out just before noon.
The service said the incident was being scaled back but some crews would remain overnight to damp down the blaze.
People living nearby were earlier told to keep windows and doors closed and to avoid travelling through the area because of the smoke.
There is a police cordon in place and some roads have been closed.
Nick Smith from West Yorkshire Fire and Rescue Service said nobody had been hurt in the fire. He described dealing with the blaze as "challenging".
"Internally the building has collapsed, the floor and the roof," he said.
Mr Smith said the incident was being scaled back, but firefighters would spend the night damping down the fire.
The fire service said appliances from neighbouring brigades were also in attendance, along with police, ambulances, Yorkshire Water and the Environment Agency.
One eyewitness, Gary Coates told BBC Radio Leeds: "As we passed there was smoke coming out and then we started seeing flames coming from the bottom floor of the mill.
"Within minutes it was an inferno. It was really bad. It was intense, flames coming out from everywhere.
"We could feel the heat from where we were parked, perhaps 200 or 300 yards away."
The mill had been used for a number of film and television production in recent years.
Richard Knight, from Screen Yorkshire, described the fire as "a sad loss to the Yorkshire film-making landscape".
"It's one of those amazing locations that is like a destination in its own right," he said.
"It's got the kind of provenance and scale that could attract film-makers from far and wide."
As well as Peaky Blinders and Downton Abbey he said part of the site had been transformed into London's Victorian-era East End for the 2016 film The Limehouse Golem, starring Bill Nighy.
The Victorian building, constructed in 1869, was once said to be the largest textile mill in Yorkshire, employing more than 2,000 workers.
It fell into disrepair before being partially restored and taken off English Heritage's at-risk register in 2015.
The complex was previously struck by a serious fire in 2011, when it was believed copper thieves set fire to the site as they tried to burn off insulation to steal metal.
Follow BBC Yorkshire on Facebook, Twitter and Instagram. Send your story ideas to yorkslincs.news@bbc.co.uk.
West Yorkshire Fire and Rescue
'I'm back in the business': Coronation Street bad boy heads for Bradford
MEMORY LANE: Six men convicted of notorious Silsden robbery
Can you help Smokey? Fundraiser for Wakefield dog who needs snout surgery
Things to do in and around Bradford during the August Bank Holiday weekend
Woman tried to sneak baby-change bag full of drugs from her home, Leeds court told
Memories of the masked Leeds United mascot
Xi, Putin to attend Bali summit - Indonesia's Jokowi
Russia to allow nuclear plant inspection, says Putin
N Korea slams South's 'absurd' offer of aid
Peace at a price in the Taliban’s heartlands
Waiting 38 years for a soldier lost on an icy battlefield
How much grain is being shipped from Ukraine?
Why India forgot this freedom hero from the south
Why a notorious Indian rape case is back in the news
Remembering the painful journey from Pakistan to India. Video Remembering the painful journey from Pakistan to India
The TikTok comedy stars trying to make it on stage
Leaping, lava and lights: Photos of the week
The castle at the centre of the Nazi's obsession with ancient myths
Turkey's massive subterranean city
The language with no known origin
Why overthinkers struggle with remote work
© 2022 BBC. The BBC is not responsible for the content of external sites. Read about our approach to external linking.