Robbie Diack (born 12 November 1985 in Johannesburg, South Africa) is a South African born, Irish rugby union player who currently plays for Ulster in the RaboDirect Pro12. He plays in the back row mainly as a number eight. He signed for Ulster at the start of the 2008/2009 season from the South African club The Stormers. At 6 feet 5 inches (1.96 m) and weighing 110 kilograms (17 st), He will be eligible to play his rugby for Ireland in July 2011 as he will have been living in Ireland for the required three years. In October 2010 Diack signed a contract keeping him with Ulster until June 2014. In March 2013, Diack was called up to the Ireland squad for the first time, having been selected for the 35 man training squad for the Six Nations clash with France. He made his full Ireland debut in the victory over Argentina in June 2014.