The agency had previously handled only public relations and event-marketing duties for KitchenAid, a brand within Whirlpool.
Digitas will handle interactive-campaign strategy, creative, interactive media planning, buying and direct-to-consumer marketing for Whirlpool's U.S. portfolio, which includes the Whirlpool, KitchenAid, Maytag, Jenn-Air and Amana home-appliance brands.
In a statement, Jeff Davidoff, Whirlpool's VP-marketing communication, North America, said the consolidation of its brands under one interactive agency is a step toward further "brand building and consumer engagement."
Earlier this year Whirlpool consolidated its creative accounts with Publicis Groupe's Publicis USA and media duties with Optimedia.
Digitas announced their third-quarter earnings today. Digitas boasted a fee revenue of $95.6 million, compared with $85.5 million for the third quarter of 2005, a 12% growth