Hogg immediately cemented a spot in the Scotland setup following his debut. Often playing at openside to accommodate Simon Taylor, he was known for his support play that lead to many of his tries for the national team. Hogg was selected for Scotland's 2007 Rugby World Cup squad, whilst becoming the first Scotland forward in 20-years to score a hat-trick of tries in one match, when he plundered a treble during the 42–0 World Cup win over Romania in September 2007.