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Nicholas Cage was originally scheduled to star in the film. He once went to the Independent Wrestling League in New York to watch and prepare for the role, but later resigned.
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For his role, Mickey Locke specially invited former professional wrestler Afa Anoayi for special training.
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The original poster of "Wrestling King" once made Mickey Rock personally dissatisfied, because Mickey Rock in the poster was completely blocked by his long hair and couldn't see his face clearly.
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At the 2008 Toronto International Film Festival, Fox Searchlight bought the North American rights to the film for US$4 million.
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In order to participate in the Oscar selection, Fox Searchlight arranged for "Wrestling King" to be screened in North America on December 31, 2008, and the official release time was scheduled for January 16, 2009.
The Wrestler behind the scenes gags
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Randy 'The Ram' Robinson: I just want to say to you all tonight I'm very grateful to be here. A lot of people told me that I'd never wrestle again and that's all I do. You know, if you live hard and play hard and you burn the candle at both ends, you pay the price for it. You know in this life you can loose everything you love, everything that loves you. Now I don't hear as good as I used to and I forget stuff and I aint as pretty as I used to be but god damn it I'm still standing here and I'm The Ram. As times goes by, as times goes by, they say "he's washed up", "he's finished" , "he's a loser", "he's all through". You know what? The only one that's going to tell me when I'm through doing my thing is you people here.
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Randy 'The Ram' Robinson: Hey lady - you want some fucking cheese? Get your own fucking cheese!