The Scottish brewer has confirmed a three-year deal with both Celtic and Rangers.
Chief executive Peter Lawwell said: “Celtic is delighted to enter into this new partnership with Tennent’s, a brand which has become synonymous with football.
“In very challenging times for Scottish football, it is fantastic that Tennent’s has maintained its high level of commitment to the game in Scotland, something they should be applauded for.
“This sponsorship provides important revenue for Celtic over the next three years, which will contribute to our continued investment in the football squad.
“We are sure this partnership with Tennent’s will be most beneficial.’
Rangers chief executive Martin Bain said: “The Tennent’s brand has been synonymous with Scottish football for decades and we are pleased they have chosen to take their sponsorship to a new level by investing in the Old Firm.
“We were extremely impressed by the vision and aspirations of the Tennent’s team and we are confident this partnership will deliver on a number of levels.”
