 Miller made his Maiden One Day International century in the 4th ODI against the West Indies on 25 January 2015.In August 2017, he was named in a World XI side to play three Twenty20 International matches against Pakistan in the 2017 Independence Cup in Lahore.Miller was one of South Africa's top performers at the 2015 Cricket World Cup scoring 324 runs at an average of 65 and strike rate of 139 during the tournament.