Harry Potter fans stunned as giant dragon roars through London streets

Londoners were left stunned as a colossal dragon, instantly recognisable from one of the beloved films, made its way through the city's streets today. The 25-foot-long animatronic creature was spotted 'trapped' inside a box, passing some of the city's most iconic landmarks like Westminster Bridge and King's Cross Station, en route to Warner Bros. Studio in London.

This dramatic stunt marked the launch of 'Triwizard Tournament – Making of Champions', a new attraction at Warner Bros. Studio Tour London – The Making of Harry Potter, celebrating the 20th anniversary of the release of .

The Hungarian Horntail, weighing an impressive 1.3 tonnes, recreates the heart-stopping moment in the fan-favourite film where Harry battles the beast in the first task of the 'Triwizard Tournament'.

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Designed by filmmaker and animatronic designer Joe Scott, the incredibly lifelike creature boasts a moving head, mouth, and eyes, accompanied by sound effects.

Taking over 750 hours to craft, the dragon features a 3D-printed head, 25kg of fibreglass, and 119 hand-applied spikes. Its intimidating mouth is lined with 38 resin-printed teeth, painstakingly recreating the film's fearsome appearance in minute detail.

Joe drew inspiration from original sketches, CGI mock-ups, and scans of the original movie model to guide the design process. He remarked, "Revisiting the creation of the Hungarian Horntail 20 years on from Harry Potter and the Goblet of Fire has been magical."

"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," he added.

"It's fantastic to see the craftsmanship that went into this on display at the new feature - inspiring visitors with the magic of our filmmaking secrets."

The 'Triwizard Tournament – Making of Champions' exhibit will run from 15 May to 8 September 2025 at . Fans will be transported behind the scenes of the iconic Triwizard Tournament, discovering how the thrilling magical challenges were brought to life.

Warner Bros. Studio Tour London's latest summer offering invites lucky visitors into the all-new Backlot Stage to explore the Secrets of Special Effects. Within this new indoor arena, incorporating a digital screen and stepped seating, are live demonstrations showcasing how filmmakers captured the magic.

One of the standout features will be the reimagined arrival of the Beauxbaton and Durmstrang students, complete with original costumes and choreographed moves.

Visitors can also uncover the tricks filmmakers used for scenes like Harry Potter's underwater breath-holding in the second task.

Geoff Spooner, senior vice president at Warner Bros. Studio Tour London, said: "We're excited to launch our brand-new summer feature, Triwizard Tournament – Making of Champions, where visitors can learn behind-the-scenes secrets of the fourth Harry Potter film.

"To celebrate and bring the magic of Warner Bros. Studio Tour London to the streets of the capital, we recreated the iconic moment of the escaped Hungarian Horntail dragon 20 years on from 'Harry Potter and the Goblet of Fire."