
The company awarded the agency its UK business after a final pitch against Fallon, Rainey Kelly Campbell Roalfe/Y&R and Irish agency Young Euro RSCG.
The appointment does not affect the Irish advertising account, which remains with Young Euro RSCG.
Earlier this month, Magners, which is owned by C&C Group, called a review of its digital account.
At present, it works with several digital agencies in the UK and Ireland, including Cake and ad agency Euro RSCG, but intends to consolidate its digital work into a single agency.
In the six months to 31 August, C&C's overall revenues fell 10.5%, with a 2% decline in Magners' volume sales in Britain and a drop in market share. The brand is now focusing on growing sales of pint bottles of cider in the on-trade.
Magners recently launched an £8m marketing push for its pear variant, including a Magners Pear microsite and a mobile campaign.