Bookings for TT 2012 are 13 per cent up on comparable figures this time last year.
According to the Department of Ecomonic Development, 37,700 visitors came to the Isle of Man for the 2011 meeting, itself a 20 per cent increase on 2010.
The popularity of the event has received a significient boost from the success of the film 'TT3D: Closer to the Edge', which was released on DVD at the end of last month.
Over 100,000 copies have been bought in the United Kingdom.
The information on TT bookings for next summer has come from Regency Travel, the official agents for the event.