Prince William, who is Vice Patron of the Welsh Rugby Union, will attend Saturday's RBS 6 Nations Championship decider between Wales and France at the Millennium Stadium and present the RBS 6 Nations trophy to the championship winner.
Wales, unbeaten to date in the championship, will win the title if they beat France - or lose by fewer than 20 points.
WRU chairman David Pickering said: "We are delighted that Prince William will be at the Millennium Stadium on Saturday to share what I am sure will be a very special day for Welsh rugby. He has taken time out of an extremely busy schedule and we are delighted that he will present the RBS 6 Nations Trophy to the tournament winner."
This will be the fourth Wales match Prince William has attended at the Millennium Stadium since he took up the role in February, 2007.
For further information, contact Liz Jones, WRU Communications Manager, tel 07736 056669 / email@example.com