Question: Dean McCarthy played a boy becoming what in an adaptation of Billy Elliott? 
Related documents: [0]  [DOC] Billy Elliot is a 2000 British dance drama film about a boy becoming a professional ballet dancer, set in north-eastern England during the 1984–85 coal miners' strike. It was produced by Greg Brenman and Jon Finn, music composed by Stephen Warbeck, co-produced by BBC Films, Tiger Aspect Pictures and Working Title Films, distributed by Universal Pictures and Focus Features, written by Lee Hall and directed by Stephen Daldry. [END] 
[1]  [DOC] Dean McCarthy (born 25 January 1992) is an Irish actor, dancer and model best known for his performance as Billy in "Billy Elliot the Musical", based on the film "Billy Elliot". [END] 
Answer: 
professional ballet dancer
professional ballet dancer