Gregor Gee, 24, from Bo'Ness, snapped up thousands of items from the 1971 movie - including a replica of Gene Wilder's bright coat and top hat - in America two years ago.
A massive fan of the movie, he even spent his 21st birthday at the Munich Gasworks in Germany - the site used for the chocolate factory in the cult film.
He has now organised a Wonka-themed party in Grangemouth later this month which will be attended by Julie Dawn Cole who played Veruca Salt, Diana Sowle who played Mrs Bucket and all the surviving Oompa Loompas from the film.
Mr Gee, who works as a memorabilia dealer and agent, said: "I've always loved the movie. I came across the collection, owned by the Dreier family, around two years ago. They had one of the most impressive film memorabilia collections in the world.
"They had every piece of Willy Wonka memorabilia, from Gene Wilder's costume to everlasting gobstoppers. It took them 20 years to build it all.
"When I saw it was up for sale I thought it would be a shame for it to be sold on and split up again after 20 years. So I decided to get as much of it as I could. I ended up getting things I never expected to get."
Among his impressive hoard is a golden egg, Grandpa Joe's costume and the world's only Scrumdiddlyumptious Bar.
He refused to disclose how much he paid for the collection but all of the items - which are stored in a warehouse - will go on show at the event.
Mr Gee said: "I have props, costumes and even the paper trail from the film including bank receipts and payslips.
"For me, my favourite items are the Scrumdiddlyumptious Bar and Grandpa Joe's costume.
"What is the point in having all of this stuff and not doing anything with it?"
Mr Gee also owns the only MGM-authorised Chitty Chitty Bang Bang car in Europe, Christopher Lloyd's shirt from Back to the Future, and Robin Williams's and Dustin Hoffman's costumes from 1991 blockbuster Hook.
But it is the incredible Willy Wonka collection which is generating a buzz around town.
Hundreds of fanatics are expected to snap up £20 Golden Tickets for the bash at Grangemouth Town Hall on March 14 and 15.
Guests will be given the opportunity to play out childhood fantasies such as trying lickable wallpaper surrounded by Oompa Loompas.
Julie Dawn Cole will also treat the audience to a performance of 'I Want It Now'.
Mr Gee, who will assume the role of Willy Wonka at the party, then plans to take the show across the UK and over to America.
He revealed he hopes to one day buy the original chocolate factory in Germany - which is actually the Munich Gasworks - and turn it into a tourist site.