McDonald's is celebrating 50 years of the Big Mac in the U.K. with a film that takes a nostalgia trip back in time thorugh the decades.

The ad, by Leo Burnett, also promotes the launch of two limited-edition promotional burgers-- the Mac Jr, a single patty version of a Big Mac, and the Grand Big Mac, a sized-up version with a larger bun and patties to match.

Director Henry Mason at Bold brings to life the hairstyles, makeup and fashions of the '70s, '80s, '90s and right up to the present day (we particularly love the floppy-haired '90s crew) as the ad recalls the years since Big Macs found their way to McDonald's U.K. branches. McDonald's advertising, packaging, restaurant designs and even typefaces are also painstakingly recreated. The soundtrack is INXS's 1987 hit "New Sensation."

The spot ends with a father and son trying the new limited-edition burgers.

Chaka Sobhani, chief creative officer at Leo Burnett London, says in a statement: "This campaign really has been a labour of love. The classic colours, the shapes and the designs brought back a flood of happy memories for us all. And we were reminded of what a ubiquitous role McDonald's has played in our cultural life in the UK. We hope audiences enjoy watching it as much as we enjoyed researching it, and remember fondly when they had their own first delicious Big Mac moment."