The Welsh Rugby Union have confirmed that the Millennium Stadium roof will be closed for Saturday's RBS 6 Nations decider between Wales and England.
The match will determine the destination of this year's title, with England also having the chance of a first Grand Slam since 2003.
The weather forecast is dubious in the run-up to the 5pm kick-off and the teams have agreed to the roof being shut.
Closing the roof requires the say-so of both sides, and with so much riding on the match their verdict has been unanimous.
They made the same decision in their last meeting at the ground in 2011, when England won 26-19.
A short statement confirmed: "The WRU can confirm the roof at the Millennium Stadium will be closed for tomorrow's Wales v England RBS 6 Nations fixture."