Just 80 minutes of action stands between England and a first Grand Slam since 2003 - and Rob Howley's men of course!
Stuart Lancaster's men arrive at the Millennium Stadium for tomorrow's showdown against Wales searching for their second RBS 6 Nations championship in three years but defending Grand Slam champions Wales are aiming to lift the roof off with their own second championship in consecutive seasons.
Whatever happens, we are following the action every step of the way right here. By logging on to www.wru.co.uk/live just before kick-off at 5pm, you can follow every scrum, lineout, pass and try.
HOW THE TILE WILL BE WON
* If England win at the Millennium Stadium, they will take the title and the Grand Slam
* If the match is drawn, England will win the title but not the Grand Slam
* If Wales win by eight points or more, they retain the Six Nations title
* If Wales win by six points or less, England will win the title
* If Wales win by seven points, they will retain the title on account of scoring more tries over the tournament
* However, if England score two more tries than Wales in Cardiff the title will be shared
* If Wales win by seven and England somehow score three more tries than Wales, they will win the tile
Birthday boy Hallam Amos gets the perfect present with his selection on the wing for Wales ahead of Alex Cuthbert as Warren Gatland's men prepare to face England at Twickenham tomorrow in a crucial pool game of the World Cup
Wales head coach Warren Gatland and captain Sam Warburton say their first prioirty on Sunday in the opening game of the World Cup is to win against Uruguay and not get overly concerned with points difference.
Captain Sam Warburton admits he is devastated for Rhys Webb and Leigh Halfpenny who will both miss the World Cup due to injury but he is confident Wales' strength in depth will see his side bounce back and mount a serious challenge.
Wales assistant coach Shaun Edwards says Wales will go into the World Cup still hurting from the semi-final defeat four years ago in New Zealand. But before that, there is the small matter of Italy, tomorrow at the Millennium Stadium.