The road racing film tells the story of Joey and Robert Dunlop, and Robert's sons William and Michael and is narrated by Ballymena actor Liam Neeson.The film is written, produced and directed by Diarmuid Lavery and Michael Hewitt and premieres as part of the festival which runs over 10 days from 27 March - 5 April.Speaking at the premiere, Robert's son Michael, who is also a motorbike racer, described what viewers can expect."It shows life in general, there's no doors hidden, it shows the true life and obviously we've had a lot of highs in our careers and the lows too," he said."That's road racing and it shows that in it, the good story about is it's the truth."There's no hidden or fake life, that's what it is so it's good that people can see that we don't do it for the money, we just do it for the dun of it and hopefully folk will see that tonight."The screening was an exclusive chance to see the film before its general release this summer.Belfast Film festival Chairman Kevin Jackson told UTV: "It's remarkable to have the opportunity to show a feature documentary made by our wonderful DoubleBand (Films) who have made in my opinion of some of the strongest documentaries made in Northern Ireland, about the world, it's not just about Ireland."For them to allow us to present this film as the opening film is a terrific honour."This year's festival programme includes more than 125 films at 16 venues across the city.Screenings will be shown both inside and outside cinemas, with local churches and schools hosting special events.One of the most anticipated events is a screening of the first episode of the new series of Game of Thrones.Over 7,000 people applied for 500 available tickets in an online lottery to be in with a chance of watching the series opener, 11 days before the rest of the UK.