He plays at Full-back. Miller was brought up in Bothel, Cumbria. Miller made his Newcastle Falcons first team début in 2008, in a man-of-the-match winning performance against Bristol.
In June 2010, Miller signed a three-year deal with Sale Sharks, where he has made a number of appearances, earning man-of-the-match status in two games.
Sale had to compete with Bath Rugby for Miller"s signature and Falcons had been keen to hang on to him. In 2009, he appeared in the Under-20s World Cup final in Japan.
On 6 February 2014, Miller signed for the Wasps from the 2014-2015 season.