"I absolutely love The Goonies," he told Digital Spy. "It's a childhood movie that I was obsessed with. Even now, every time I watch it I'm blown away still."
The comedy-adventure stars Sean Astin and Josh Brolin as two young brothers in Oregon who want nothing more than to save their neighbourhood from being demolished in favour of the construction of a golf course.
When they find a treasure map, they embark on a quest for treasure with their friends to save their homes.
Claflin, who has signed up for the upcoming Kristen Stewart film Snow White and the Huntsman, believes that The Goonies is timeless: "It's one of those films that I think will live on forever. I can't wait to have kids so I can just make them watch it.
"It can never be re-done. It's perfect the way it is and a film I grew up with."
The treasure lies in a cavern, but the lads' adventure naturally isn't smooth-sailing. The entrance sits under an abandoned restaurant in which a family of fugitives, the Fratellis, are hiding out.
Director Richard Donner recalled in a 'making of' documentary that though the child actors were a handful to manage, they had plenty of energy and enthusiasm while shooting.
Claflin adds that he thinks the outdoors is under appreciated nowadays: "I have three brothers and we all sat down with our dad and watched it for the first time all together. I used to live like that. It's a shame there's so many video games in a sense that people don't go off and climb trees anymore. They play LEGO Pirates of the Caribbean!
"I spent my time in the woods up the road from me or playing football in the field. It's a shame, I suppose, but there's so many great games that I play myself now I can't complain!"
The Goonies is a wonderful coming-of-age film that can be appreciated by anyone who has a craving for adventure. Rather fittingly, Claflin's breakthrough role in Pirates of the Caribbean involved a similar treasure quest - though instead of jewels, it was the promise of eternal youth.
Watch the trailer for The Goonies below:
Previous My Favourite Movie features:
> Freddie Highmore and Cinema Paradiso