An iconic scene from Back to the Future has been recreated in the city that built the famous DeLorean cars immortalised by the films.
Doc Brown's legendary zip line ride from the clock tower of the fictional town Hill Valley was staged in Belfast to mark "Back to the Future Day".
October 21 2015 is the date Doc Brown (Christopher Lloyd) and Marty McFly (Michael J Fox) travelled forward to in the second instalment of the movie trilogy. They arrived to a futuristic world of flying cars and hover boards.
While the film's vision of the future has not wholly materialised, fans of the movies are marking the day in the style.
In Belfast, where the silver gull-wing DeLorean cars were manufactured, two local actors have re-imagined the zip line scene, with a comic twist, at the clock tower in the Gasworks area of the city centre.
Gerard McCabe took on the role of the Doc, with his character whizzing from the Gasworks clock tower down to Belfast's own Marty McFly Dan Gordon waiting in the DeLorean below.
At the start of the 1980s, controversial US industrialist John DeLorean brought his car manufacturing plant to Dunmurry in west Belfast with the lure of significant government financial support.
Although the factory initially injected some much needed optimism in Troubles-era Northern Ireland, its stay was short-lived and ultimately ended in failure.
When the first Back to the Future film was released in 1985, the DeLorean plant had already been closed for three years. Fewer than 9,000 cars had rolled off the production line at the Dunmurry plant.
The film stunt was created by Northern Ireland lager brand Harp.
Lisa Ronayne from Harp said it was a tribute to the enduring characters of Marty and Doc.
"In 1985, two of the most celebrated characters in film history took to the skies in a Northern Ireland-built time machine and travelled 30 years into the future, eventually arriving today: October 21, 2015," she said.
She added: "We wanted to thank them for their outstanding contributions to science fiction and thought the best way of doing this was by paying homage to their original time-travelling journey which took place at the Hill Valley clock tower in 1955.
"I look forward to thanking them both in person, in the future, if I haven't already done so."
A host of events are taking place across the country to mark the occasion, including at the National Space Centre in Leicester.
Cinemas including Vue and Odeon are holding screenings of all three films back-back in cinemas and an 80s-themed showing will take place at the Brooklyn Bowl in Greenwich, south-east London.
While the hoverboards depicted in the films have not materialised, a fire service has issued a warning about leaving self-balancing scooters to charge unattended.
London Fire Brigade said incidents involving the popular so-called "hoverboards" took place within days of each other.
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