What happens when you take a load of A-list stars and put them on a boat with nothing but old music for entertainment? The cast of '60s pirate radio movie The Boat That Rocked did just that, so Newsbeat caught up with Nick Frost, Bill Nighy and Rhys Ifans to find out what went on, who was the most fun and what it felt like getting naked on camera.
Bill Nighy, Talulah Riley, Rhys Ifans and Gemma Arterton get close
We see a lot of you in this movie, was there any nervousness about filming the naked scenes?
Nick Frost celebrates with best mate Simon Pegg
There was none on the day, a little bit two weeks before when you look at the filming schedule and think, 'Oh no, I have to do this in two weeks'. But I played a lot of rugby growing up so getting naked in front of a big group of men, which is essentially what a film crew is, wasn't really a problem in the end.
There are so many people waiting to shoot you, or to make you up or to supervise your script that you just have to say, 'I'm just going to do it, just turn your backs and I'll take 'em off.'
The soundtrack's amazing, I know that you were listening to a lot of music while you were filming
We listened to music all the time and we had a big PA on the ship so every time we weren't shooting or if we were steaming out to where we would anchor and act there was music just constantly.
We were all given iPods with 500 songs from the era on. I didn't listen to any music post '69 for the whole period I was involved which was really difficult. As much as I love Jimi Hendrix and certain aspects of '60s psychadellia, it was quite tough to not go home and put on some hard house compilation, which is my real love.
You're like the boss character in this film, is that what it was like on set?
Yeah, I only had to shout and people jumped. No - as if! Are you serious? If you're on a boat with Nick Frost, Philip Seymour Hoffman, Rhys Ifans, Ryhs Darby, Tom Sturridge then you'd do anything, not that I had any plans to ask them do anything.
Bill strikes a pose as the cast move on to the Australian premiere
I am the boss yea, it's my radio station, it's my boat, it's my world.
It's a very starry cast isn't it?
Yeah, I mean what a collection, which is a tribute to Richard and his script. It's marvellous to get that collection of people in one place at the same time and all very funny and very nice guys.
We had a really nice time, I know they always say that but we actually did have a marvellous time. We were floating on a boat off the coast of Dorset. We had a toastie machine so we could have a toasted cheese sandwich any time we wanted.
You could have anything you wanted, crisps, loads of crisps in different flavours, and you could dance all day. There were certain days we were required to simply dance. It turned into a sort of Elvis Presley movie, like a proper pop film or a pop video.
You play what is supposed to be the sexiest DJ on the boat which is a bit of a change from your character in the last Richard Curtis movie...[as Spike in Notting Hill]?
Rhys looks like he's enjoying the benefits of his role at the premiere
I was really touched - it's like polar opposites. It's brilliant. I was touched that Richard thought that I was more than a pair of grey pants!
It seemed like you all had a lot of fun with the characters?
It was great . Working in a confined space like like a boat it just generates a certain type of banter - which was filthy!
Who was the most fun?
Just look at the poster, there's all these very, very funny guys. It was just a joy from start to finish. It's inevitably going to be a mischievous atmosphere, boats do that I guess.
We went on a boat camp before we started filming so we spent a week on the ship. We bonded day two and felt like we could take over a small country.
Nick Frost, Bill Nighy and Rhys Ifans were talking to Newsbeat entertainment reporter Sarah Jane Griffiths.