After winning multiple World and European Junior titles in 2006 and achieving medals in the under 23 European championships in 2007, Kenny was selected ahead of Ross Edgar to compete for Great Britain at the 2008 Summer Olympics in Beijing. Along with Chris Hoy and Jamie Staff, he won a gold medal in the team sprint, breaking the world record in the qualifying round. He finished behind Hoy in the final of the individual sprint, gaining a silver medal.