The Reading Beer and Cider Festival will run for an extra day this year in celebration of the royal wedding.
The annual festival will take place at King's Meadow in Reading from 27 April to 1 May.
Last year it attracted 14,000 people, who drank thousands of gallons of real ale, cider, perry, foreign beers and wine and mead.
The festival is staffed by 450 volunteers and is underwritten by the Campaign for Real Ale (CAMRA).
Festival sponsorship manager Brian Jones said he hoped there would be a good turnout.
"The weather will be important to us," he said. "We're hoping to get loads of people in on the Wednesday and the Sunday."