McGregor, known as much for his roles in movies such as Trainspotting and Star Wars as for his round-the-world travels on BMW motorcycles, has designed the 50th anniversary Bonneville with copper-plated tanks and Belstaff black-waxed cotton on the seat and side panel.

It is inspired by a bike in his collection of vintage machines, as well as his love of the legendary motorcycle enthusiast, Triumph rider and fellow Hollywood actor Steve McQueen.

"I wanted to use a traditional waxed cotton material as it has such a resonance with the history of style in motorcycling, and mix it with the tradition of coppering tanks," he said. "I am a huge fan of Steve McQueen and his films from the 1960s, and the font that I have chosen for the Triumph logo harks back to that golden era of biking. This is such an exciting project for me. The Bonneville has to be the ultimate in British motorcycles, so the chance to create my own design and see it through to production is amazing."

McGregor's specially designed bike will be auctioned for his chosen charity, UNICEF, for whom he is an ambassador.

Details of the auction are yet to be released.

Motorcycle clothing manufacturer Belstaff is also producing a bespoke design of the Bonneville incorporating a sophisticated black-and-gold colour scheme synonymous with the fashion brand's identity, of a gold seat cowl and a black-and-gold pannier bag. There will also be a limited-edition biker-style jacket to mark the anniversary.

The Bonneville was named in recognition of Johnny Allen's 1950s record-breaking feats on a Triumph at the Bonneville Salt Flats in Utah.

The first Bonneville, the T120, was showcased at the Earls Court Bike Show in 1958.

Source: Couriermail.com.au