<P> In February 2011, The Hollywood Reporter reported that Stanley Tucci had been cast as the antagonist, the king's advisor who plans on taking over the kingdom, and Bill Nighy and John Kassir were cast as Fallon, the two - headed leader of the giants; Nighy would play the big head and Kassir would play the smaller head . Also in February, Nicholas Hoult was offered the lead role . Singer said he had liked him since Skins and was very supportive of his casting in X-Men: First Class . Later that month, Ewan McGregor joined the cast as the leader of the king's elite guard, who helps fight giants . </P> <P> In March 2011, Eleanor Tomlinson was cast opposite Nicholas Hoult as the princess and Ian McShane was cast to play her father, King Brahmwell . Two days later, New Line and Warner Bros. announced a release date of June 15, 2012 . </P> <P> Principal photography began on April 12, 2011, in the British countryside . In May 2011, production moved to Somerset, England for two weeks with filming scheduled in Wells, Cheddar and secret locations in the county including scenes filmed at Wells Cathedral . Also in May, scenes were shot at Puzzlewood in the Forest of Dean near Coleford, Gloucestershire . Puzzlewood, which features unusual tree and rock formations, has previously been used for filming of the BBC TV series Doctor Who and Merlin . The same forest is said to have inspired J.R.R. Tolkien to write The Hobbit . Later that month, filming took place at Norwich Cathedral in Norwich, Norfolk . </P> <P> About the performance - capture process Singer stated, "It's fascinating...It takes you back to play - acting as a kid in your living room because you are running around and having to imagine that you are in Gantua and imagine that there are these weapons and all these giant things . But there's nothing when you are there other than styrofoam and blocks . It forces the actors to regress to when they would play - act as kids or do minimalist theatre . But in that way it's fascinating - I can see why Robert Zemeckis and James Cameron have started to shoot pictures this way". </P>

Where was jack and the giant slayer filmed
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