Since the 2007 season, the National Football League (NFL) has hosted regular season American football games outside of the United States every year in a series known as the NFL International Series. To date, all of the games in the International Series have been held in London, England. Wembley Stadium was the exclusive home stadium for International Series games from 2007 to 2015 and will continue to host NFL games through at least 2020; beginning in 2016, the series will begin expanding to more stadia, first to Twickenham Stadium, London (2016–18) and to Estadio Azteca, Mexico City, Mexico (2016–) and eventually to the still under construction new stadium at Northumberland Park also in London (2018–27).