Thursday, May 8, 2014 2:35am ET by  
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Pharrell Williams, Ellie Goulding and David Guetta for Capital FM's Summertime Ball

Pharrell Williams is among the latest additions to the line-up of this year's Capital FM Summertime Ball.

The radio station are hosting their annual bash at London's Wembley Stadium on June 21.

On Wednesday (May 7) they confirmed that their first announced act was Miley Cyrus.

Capital FM have now followed this up by revealing that Pharrell Williams, Ellie Goulding and David Guetta will also take to the stage.

They're joined by fellow newbies The VampsCheryl Cole, Little Mix, Jessie JRita Ora, 5 Seconds of SummerEnrique IglesiasUnion J, Sam Smith and Clean Bandit.

The final acts to be confirmed for the event are Ed Sheeran, Calvin Harris and Duke Dumont.

Tickets for the Capital FM Summertime Ball will go on sale from Friday (May 9) at 8am UK time.

Watch some of the new additions in action below: