The King of Beer is going upscale.

Anheuser-Busch Cos. Inc. signed a deal Tuesday to be the sole U.S. distributor of Grolsch beer, a high-end European import.

The move comes as beer sales are flat in the United States, cutting into the profits of Anheuser-Busch, the nation’s biggest brewer and maker of the Budweiser, Michelob and Bud Light brands.