Maguire performed the role of "Billy" for the opening night performance 12 May 2005, and continued performing until 17 December 2005,[2] when he left the cast. He was replaced by Travis Yates.[3] Together with his two original cast mates James Lomas and Liam Mower, he alternated in the role of Billy, and after leaving, performed again in a first anniversary Gala show of Billy Elliot the Musical on 12 May 2006.
Maguire was featured as a guest on Ready, Steady, Cook (he won the episode against his close friend Leon Cooke who also played Billy Elliot) and in several morning TV shows,[7] TV interviews, and short clips related to the musical. From 2005 to 2008 he worked as a moderator, moderating and supporting several Mardi Gras dance shows of British dance schools - The Stars in the Round at the Royal Albert Hall and The Stars in Your Eyes at Sadler's Wells Theatre, London.
In April 2009 he appeared in the ITV zombie comedy Renaissance (starring Kelly Brook and Alan Dale) - playing Tim, the son of Dale's character. The story told of the making of Renaissance and was part of the ITV drama Moving Wallpaper.[8]
He became a member of the actors' union Equity as George Maguire, however, another actor of the same name has been working in the West End since 1995, which has led to some confusion on the internet.[10][11]