Daniel Radcliffe is toning up his butt in preparation for his Broadway debut. The 'Harry Potter' actor - who starts his run on the New York stage in September - wants to make sure he is in top physical condition for his role in 'Equus', in which he appears naked.

The 18-year-old star has reportedly purchased a Skorcher Butt Machine, which specialises in shaping rears. He told a friend: "They don't have things like this in Britain." It was recently reported Daniel's manhood will be protected by security when he makes his debut.

Theatre bosses are worried audiences may try and sneak in cameras just as some fans did when he appeared in London's West End. A source said: "When the show opened in the UK, some rather over-enthusiastic female fans sneaked cameras in to snap Daniel when he strips naked on stage. "They all wanted pictures to circulate to friends and over the internet so we are bringing in tighter security." Daniel - who plays young wizard Harry Potter in the big screen adaptations of J.K. Rowling's books - recently confessed he is nervous about making his Broadway debut. He said: "It will be amazing - but I will be terrified!"