Italian club players will now have the opportunity of playing against Welsh teams in the Magners League as well as in the Heineken Cup.
The Welsh Rugby Union has welcomed the initiative to introduce two new Italian teams to the Magners League from the start of next season 2010/11.
According to the WRU the move will strengthen the Magners League competition and prove a major incentive to attract new support.
Welsh Rugby Union Group Chief Executive, Roger Lewis, said: "We are delighted to welcome Italy into this great competition.
"For the last two years it has been our ambition to deliver an enhanced tournament which will expand and continue to develop as a showcase for some of the very best of northern hemisphere rugby.
"It will prove a great incentive for all four Welsh Regions to test themselves against teams from a nation which is emerging as a real strength in the European game.
"Moreover, involvement in the Magners League will serve to strengthen Italy's position in the RBS 6 Nations tournament.
"The new, twelve team Magners League format across four nations will provide players, supporters and television viewers with an opportunity to savour some great fixtures.
"Our players already enjoy great rivalry with Italian opposition both internationally and through the existing cup competitions so the time is right to extend and develop that link through the Magners League.
"The inclusion of two Italian superteams will also add a new and important European dynamic to a competition which has become a powerbase of the professional game.
"I personally want to thank my colleagues from Celtic Rugby and all the other unions involved for their hard work and resolve to achieve this.
"I particularly want to thank Stuart Gallacher of Regional Rugby Wales who has worked tirelessly alongside me during the ongoing debate and discussions.
"Throughout the year long review and the more recent negotiations we have remained determined to ensure we achieved a great outcome for northern hemisphere rugby.
"This announcement will start an important new chapter for Welsh rugby and will will serve to encourage further support and widen the appeal for our national sport."
Wales Head Coach Rob Howley talks to WRU TV's Sebastian Barrett about the 36-man squad he has just named for the forthcoming Under Armour series, which includes two uncapped players, Ospreys duo Sam Davies and Rory Thornton.
Head coach Rowland Phillips is deligthed he can now call BT Sport Cardiff Arms Park home for his Wales Women's side, who launch their international season next month with games against Scotland and UK Armed Forces in the heart of the capital city.
Wales Sevens star Sam Cross has put his home town club of Brynmawr on the map after winning a silver medal at the Rio Olympics with Team GB. His club have now honoured him by naming their players bar after him, as WRU TV discovered at the official launch, recently.
One of the newest members of the Principality Premiership, Bargoed admit it's proving to be a steep learning curve at the highest level, but are determined to become a force to be reckoned with. WRU TV visited the club last weekend when they took on Llanelli.
Table-topping Aberavon travel to north Wales to tackle RGC 1404 as both teams defend unbeaten starts to the season in the Principality Premiership. WRU TV's Graeme Gillespie visited the Wizards to see how their preparations were going for the game of the weekend.
The Half a Game initiative is currently sweeping across Wales and proving a major success. The scheme aims to give every young player at least half a game every weekend. WRU TV recently visited a festival in Narberth where clubs have fully embraced the initiative.
Both Bargoed and Swansea were seeking their first win of the Principality Premiership season this afternoon. It proved a fruitful day for the hosts - not only did they win, but Bargoed claimed a try bonus point.
Cardiff managed to keep their unbeaten record at home intact, but only just as Bridgend made them work extremely hard before the Blue and Blacks secured a hard fought Principality Premiership win at the BT Sport Arms Park last night.
Former Wales back row Andy Powell gives a guided tour of The Wern, home of Merthyr RFC, who are determined to prove a lot of people wrong and make their mark in their first season in the Principality Premiership.