The airport is expected to handle the majority of the 500,000 anticipated overseas fans flying in for the tournament as well as most of the participating teams.
England rugby legend, Will Greenwood, who was part of the 2003 winning England squad, was at the airport to do the unveiling.
He also handed out winning tickets to some lucky competition winners and met plenty of fans – both passengers and Heathrow staff.
Greenwood said: “After playing in front of more than 80,000 at Twickenham, I understand the pressure and importance of fielding your A-team on the day.
"The Heathrow team are used to doing this every day as they welcome millions of passengers each year. This tournament gives us a great opportunity to give the world a warm welcome to the UK as this memorable rugby season kicks off.”
John Holland-Kaye, chief executive of Heathrow noted: “As the UK’s frontdoor, Heathrow is proud to welcome rugby fans and players from across the globe to Rugby World Cup 2015.
"Most of the teams have now arrived through and the excitement is building for the opening ceremony and games. We are delighted to be part of the team working to make this a fantastic tournament for everyone involved."