The world premiere of the Johnny Depp-produced documentary, Crock of Gold - A Few Rounds with Shane MacGowan, takes place at the San Sebastian Film Festival tonight.
Although MacGowan will be forced to miss the first public screening due to Covid travel restrictions, it is understood he hopes to celebrate its release with a star-studded launch in Dublin later this year.
In the meantime, the Julien Temple-directed film will look at the life of the hard-living poet and singer from his childhood years until today. Big-name contributors include Depp, Bono, Nick Cave, Bobby Gillespie, Elvis Costello and Gerry Adams.
Temple has previously worked on a critically acclaimed documentary on the Sex Pistols and has directed music videos for musicians including David Bowie, Joe Jackson, Neil Young, Blur, Depeche Mode and The Rolling Stones,
A spokesperson for the film, Mark Jones, said fans can expect a "warts and all" documentary, adding: "Shane is very honest about everything he has been through."
The film includes unseen footage from the early days of the singer's life and will detail his heartbreak following the sudden death of Kirsty MacColl - with whom he performed on Fairytale of New York.
Jones revealed it will also contain "some really interesting conversations between Shane and Gerry Adams about what it means to be Irish".
Meanwhile, Victoria Mary Clarke, who is married to the Pogues frontman, said fans can expect Shane to open up about his relationship with his father.
"What people don't realise is that his dad was very much a rebel too. The footage from that time is very funny, he is very irreverent towards him," she said.
She said she became emotional as the couple watched early footage of their 30-year relationship ahead of the screening.
"I was always the girl carrying stuff, very quiet, content to trail along, never really having an opinion," she laughs. "I'm glad that's all changed."
And she said producer Stephen Deuters "deserves a medal" for his ability to manage MacGowan and Depp on the same set.
"Shane and Johnny are like two very powerful four-year-olds who have all of the toys and they will only play when they want to play. You can't make them do anything you want them to do - you just have to wait and see what happens.
"They are very eccentric and they live in the moment so it was very funny trying to watch anyone try and manage that. Stephen really is a saint."
The film, which will be released in the coming weeks, is already hotly anticipated stateside, where Magnolia Pictures has picked up the North American rights following a bidding war.
Speaking about the biopic earlier this year, Depp said: "Knowing Shane for 30 years, I am honoured to be producing the definitive film on both my friend and one of the most important artists and beloved poets of the 20th century."