It's that time of year when our screens are filled with festive adverts - including Coca-Cola's famous Holidays Are Coming ad which first aired in 1995.
But many will remember when the soft drink giant chose Liverpool as its stage in 1987, for the 'General Assembly' advert filmed at St George's Hall.
The unforgettable film, which Coca-Cola has shared with the Liverpool ECHO, will transport you back in time - and shows more than a thousand youngsters in colourful 1980s attire singing their hearts out in the city-centre landmark.
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The ad sees the singing cast holding bottles of Coca-Cola whilst moving around inside on both the ground-floor and higher up by the grand pillars decades ago.
According to Coca-Cola, thousands of teenagers in the city applied to be a part of it, with the brand offering a special message of "promise us tomorrow, and we'll build a better world for you".
The veteran production crew for General Assembly included filmmaker Howard Guard and director of photography David Watkin. The music was written by song-writing couple Ginny Redington and Tom Dawes.
A cast of more than a thousand young people performed the music of the spot in 16 different languages with two weeks of shooting and a crew of over 300 required to complete 19 separate versions.
An additional group of 20 performers travelled to Liverpool from their native countries to assume lead roles in the film, each singing the lyrics in one of 16 languages.
In addition to English, the ad was filmed in Portuguese, Thai, Japanese, Greek, Cantonese and Mandarin Chinese, Italian, German, Afrikaans, Zulu, Sotho, Korean, Malay, French and various versions of Spanish.
Do you remember Coca Cola's 1987 advert being filmed in Liverpool? Let us know in the comments section below.
At the time, St George's Hall had been unused for several years and was transformed into a "hall of nations".
And Coca-Cola said it was chosen as the filming location as it provided "the proper look and feel needed for the project".
Among the 300 strong production and support people assembled in Liverpool to create the advert were security personnel, nurses, and caterers, as well as camera, lighting and sound experts, set decorators and make-up experts.
Beginning in September 1987, a production crew of 80 people spent seven days on the actual filming of General Assembly, with scenes requiring the entire cast taking three days to shoot.
Coca-Cola said the remaining four days required fewer cast members and were spent putting the "finishing touches" on the various language versions.
In a casting process that spanned six weeks, director Howard Guard first visited the board of education in the Liverpool area, as filming would require the cast to miss up to seven days of school and the full cooperation of the board was needed.
According to Coca-Cola, Guard found a progressive director of the board who knew the students could "gain tremendously through exposure to such a project".
To assist in the handling of such a large cast, one adult counsellor was assigned to each 50 cast members to assist in organising the shoot.
Production also saw a thousand savings accounts established with local Liverpool banking institutions in order to provide an orderly means to pay the cast members.
But keeping a veil of secrecy around the project was no easy task and was not entirely achieved.
Coca-Cola said an enterprising Liverpool television reporter did manage to interview several cast members during one day's shooting and even got some of them to sing bits of the music from General Assembly on camera.
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In the end, however, the reporter admitted he had been unable to find his way into St George's Hall for a close-up look at the project and concluded his evening news report by showing a statue of Benjamin Disraeli holding a can of Coke.
Director Howard Guard previously said: "Producing 'General Assembly' was the most satisfying experience I've ever had working on a film.
"I became very involved emotionally with this project, in working with kids from all over the world.
"I felt we were working on something special, something that wasn't trendy, but classic. I felt, and the kids felt, that the time was right for this kind of message."
The final product saw 19 different versions of General Assembly produced in 16 different languages.
The ECHO has launched a 48-page Christmas nostalgia supplement in print. It's perfect as a stocking filler and yours for just £2.50. You can order a copy here.
Four weeks of editing followed the filming and, by mid-October that year, a final version of the Coca-Cola advert was completed.
The 60-second film from The Coca-Cola Company aired during the World Music Video Awards on January 12, 1987 - but it still holds fond memories for the people of Liverpool who were a part of it and remember it.
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