The agency beat the incumbent, MediaCom, in the last round. The original pitchlist also included PHD and Carat.
The review formed part of a country-by-country review of the media duties of the company. MPG has also recently picked up the business in Mexico, as well as in France.
Andreas Ostermayr, the senior vice-president of marketing for Danone's US business, said the company was going to increase its spend significantly in the region in 2007.
He added: "We are impressed with MPG's strategic counsel, depth of market knowledge and well-established, integrated management of the US and Canadian markets."