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Singer Beyonce Knowles will be one of the headline acts at Glastonbury this year, her record company has announced.

The US pop star will perform on the Pyramid Stage on the last day of the event in Pilton in Somerset, Columbia Records revealed in a statement.

"I'm pumped just thinking about that huge audience and soaking up their energy," the 29-year-old star said.

Organisers of the festival, which runs from 22 to 26 June, have yet to officially announce 2011's line-up.

Tickets for this year's event went on sale in October and sold out in around four hours.

"This really is the biggest festival in the world and I cannot wait to perform there," said Knowles.

"Everyone who attends is really appreciative of music and is in such a good mood that entire weekend."

Last year's line-up included Stevie Wonder, Kylie Minogue and Gorillaz, who stepped in when U2 were forced to pull out.