In 2015, having also won it in 2014.
Ireland have won the Six Nations title three times. In 2009 when they beat every other team to win the 'Grand Slam'. They also won in 2014 and again in 2015, though they did not complete the Grand Slam in either of those two years.
New Zealand last won the Rugby World Cup in 2011.
England last won the rugby world cup in 2003 and was co-hosted by Australia and New Zealand. England won the final against Australia 20-17 with Johnny Wilkinson scoring a drop goal in extra time
Yes, Ireland had beaten Australia in Rugby before the 2011 World Cup win over them.
It is contested annually by the national teams of England, Scotland, Ireland and Wales, Ireland in 2009 were the latest to win the competition
2009
2008,2009,2010.
Italy join the Six Nations Championship in 2000
Its a rugby tournament which happens every year, It has a set of six nations or countries which play each other once in order to try and win the cup. Teams which compete are Wales, England, Italy, France, Scotland, Ireland. Those teams always are involved in it and they don't have to qualify for it and they don't get through based on world ranking places. This is a rugby tournament for Europe and these are the only decent teams in Europe. Southern hemisphere teams like new Zealand and Australia compete in a quad nations.
England last won the Five Nations in 1996. It became the Six Nations in 2000. See the related question below.
Scotland has never won the Six Nations although they won the last Five Nations in 1999.
Ireland have not won the Rugby World Cup yet.