[3] Williams made his international debut on 5 February 2000 against France in the opening round of the 2000 Six Nations Championship at Millennium Stadium in Cardiff.
[5] This try was his 28th at Millennium Stadium, surpassing Rory Underwood of England, with 27 at Twickenham, for the most international tries scored by a player from one of the ten "Tier 1" nations at a single ground.
His 30 tries away from his home country (including those at neutral sites) were the most for any player in history at the time of his retirement,[6] though that record has since been broken by Habana.
[6] Williams was most prolific against Italy, Japan and Scotland, scoring nine tries against each team; he retired with the record for most tries by an opposing player against each of these nations.
All of his tries against the Springboks were on South African soil, which at the time of his retirement tied him with New Zealanders Christian Cullen and Joe Rokocoko for the most overall.