Harry Potter dragon rolls through London Streets – Warner Bros / SWNS

A giant dragon that fans will recognize from a classic Harry Potter film stunned Londoners as it roared its way through the English streets.

The 25-foot-long animatronic creature appeared ‘captured’ in chains, snarling past iconic landmarks like Westminster Bridge and Big Ben. (Watch the video below…)

The theatrical stunt was staged to mark the launch of ‘Triwizard Tournament–Making of Champions’, a new exhibit at Warner Bros. Studio Tour outside London, where visitors can step into movie sets including the Great Hall, Forbidden Forest, and Diagon Alley.

‘The Making of Harry Potter’ celebrates the 20th anniversary of the cinematic release based on the book Harry Potter and The Goblet of Fire.

The Hungarian Horntail, which weighs in at a hefty 1.3 tons, recreates the jaw-dropping moment where Harry battles the beast in the first task of the ‘Triwizard Tournament’.

Designed by Harry Potter filmmaker and animatronic designer Joe Scott, the lifelike creature moves its head, mouth, and eyes, with roaring sound effects.

Replicating the drama of the film, the dragon’s chained journey mimicked its on-screen escape, appearing at tourist spots around the city before heading back to the Warner Bros. Studio Tour located in Hertfordshire, outside of Watford, an hour from London.

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Crafted with a 3D printed head made of fiberglass, and 119 hand-applied spikes, its menacing mouth is lined with 38 resin-printed teeth, recreating the film’s fearsome look in painstaking detail.

Scott used original sketches, CGI mock-ups, and scans of the original movie model to guide the design process.

“Revisiting the creation of the Hungarian Horntail 20 years on from Harry Potter and the Goblet of Fire has been magical,” he said.

“Creating the dragons for the Triwizard Tournament was no mean feat, with engineers, animatronics, designers, and the special effects teams all working together to bring them to life.

“It’s fantastic to see the craftsmanship that went into—inspiring visitors with the magic of our filmmaking secrets.”

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In the Triwizard Tournament exhibit, running from May 15 to September 8th this year, fans will be transported behind the scenes of the iconic Triwizard Tournament, discovering how the thrilling magical challenges were brought to life.

The dedicated indoor space includes a digital screen, tiered seating, and live demonstrations revealing how filmmakers created the magic.

Among the highlights is a reimagining of the arriving magical students from Beauxbaton and Durmstrang, complete with costumes and choreography. Audiences will also discover the techniques used to show Harry holding his breath underwater during the second task.

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