Taylor Lautner was ''attracted'' to 'Cuckoo' because of its nudity and swearing.
The 22-year-old hunk - who plays Dale 'Cuckoo' Ashbrick, Jr. in the BBC Three show - was drawn to the crude sitcom when he heard foul language, vomit and pooping in a bathtub would be involved.
Speaking to The Sun newspaper, he said: ''I knew you guys [the UK] could get away with much more than we can in the US but even so, I was shocked!
''That's one of the things that attracted me -- there are so many less restrictions than we deal with in America.
''The writers were getting away with lots. I was very surprised but it is one of the things that I enjoyed most.''
Taylor's alter-ego turns out to be the son of Cuckoo (Andy Samberg), but after he is tragically killed in the Himalayas while taking part in a mountain trek, Dale is forced to move in with Cuckoo's reluctant in-laws Ken and Lorna (Greg Davis and Helen Baxendale).
Dale is the 'Twilight' actor's first comedy role and he admits he was initially worried about taking on such a humorous part, but settled in quite quickly.
He explained: ''I wouldn't say I was confident about comedy at first but I wanted to give it a shot. I knew I would be surrounded by people who knew what they were doing so that would be a huge help -- and that's exactly how it turned out. I couldn't have been luckier.''
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