It therefore came as no surprise that Wallace was called up to the Ireland Autumn International Squad and won his first cap when coming on as a replacement in Ireland's record 32–15 victory over South Africa. He did not get on in Ireland's second game, a 21–6 victory over Australia, but did start and indeed star in the 61–17 thrashing of the Pacific Islanders, in what was the last ever international at Lansdowne Road. Wallace scored 26 points, including a try, 6 conversions and 3 penalties.