Celtic and Rangers have unveiled a three-year joint sponsorship deal with Carling worth up to £12m (€18m).
The Old Firm will wear the company logo on their shirts from next season when their current deal, with ntl, runs out.
Celtic chief executive Ian McLeod said: "The Old Firm is delighted to welcome Carling as our new shirt sponsor.
"Carling is the biggest brand in the UK and we are very pleased that they have recognised the value that Celtic and Rangers can provide in assisting them with development plans for Carling in Scotland."
Rangers' director of football business Martin Bain added: "Carling is an industry leader and we are delighted to secure a partnership with such a major player in the sports sponsorship environment."