Scottish Rugby have announced that a four-year sponsorship deal with BT has been sealed.
The partnership means that BT will sponsor the Scotland 7s side for the HSBC Sevens World Series, while the home of Scottish rugby union will be renamed BT Murrayfield Stadium.
The deal also includes BT becoming exclusive sponsors of next season's cup competitions and domestic league.
"This is a momentous day for Scottish Rugby," said the union's chief executive Mark Dodson. "We are very proud to bring BT back into our family of sponsors on a size and scale that is unprecedented both for Scottish Rugby and, we believe, Scottish sport.
"While the headlines may be dominated by the naming rights of the stadium, today's announcement underlines BT's alignment to our own values and goals, particularly that rugby clubs are the heart and soul of their communities that offer a welcome to all, young and old, boys and girls, men and women."
The partnership will also focus on youth development as BT become the sponsors of Scottish Rugby's four academies.