Other acts who have just been announced for the event at London's Hyde Park include hip-hop stars Tinie Tempah and Plan B, as well as Chase & Status, Aphex Twin, Janelle Monae and Battles.
Black Eyed Peas - who were inadvertently unveiled as performers last week when their name appeared under listings on Ticketmaster - will top the bill on Friday, while The Chemical Brothers will play last on Saturday.
The newly-reformed Pulp were announced as Sunday night's headliners last year.
It was also revealed that the event will be Black Eyed Peas' only UK festival appearance in 2011.
This year's Wireless Festival runs from July 1 to July 3. Tickets go on sale on Friday.