Lewis was selected for Australia in the 2013 Anzac Test and played from the interchange bench, scoring a try in the 32–12 victory over New Zealand at Canberra Stadium. Lewis' form was also impressive enough to earn him a spot in the New South Wales team for the 2013 State of Origin series. Lewis finished his first year with Cronulla-Sutherland scoring four tries from 20 matches. At the end of the year, he was selected for the Australian squad to travel to Europe for the World Cup tournament. In Australia's match against Fiji, Lewis suffered a dislocated shoulder after crashing into an advertising sign while scoring a try.