Sky Sports will screen live RaboDirect PRO12 games for the first time from 2014, it has been announced.
Celtic Rugby have confirmed a four-year deal with the satellite broadcaster that will see Sky showing 30 live games per season, plus the competition's play-offs and final.
The agreement will begin at the start of season 2014-15.
Sky is currently in its final season of broadcasting Aviva Premiership fixtures, with live English domestic rugby moving to BT Sport next season.
"The RaboDirect PRO12 features the top teams from Ireland, Wales, Scotland and Italy," Celtic Rugby chief executive John Feehan said.
"Our competition is thriving, with increased numbers going through turnstiles as well as increased TV audiences.
"The quality of our competition is such that 24 out of the 37 players selected for the 2013 Lions tour to Australia play in the RaboDirect PRO12.
"We believe that this agreement with Sky will allow us to bring our tournament to an even bigger television audience.
"This is a milestone for Celtic Rugby as it is our first ever network coverage deal in the UK and Ireland."
Celtic Rugby revealed they are still in negotiations with other broadcasters, and will announce further agreements in due course.