Headline acts will include Leona Lewis, Jack White, D'banj, Jessie J, Will.I.Am, Florence and the Machine, Tinie Tempah and Plan B.
The festival will be held over six stages including the Radio 1 Main Stage, the 1Xtra Arena, the Dance Arena and the BBC Introducing Stage.
Hackney Big Weekend will be a great opportunity for Hackney residents and business. There will be workshops at the Radio 1 Academy in Hackney, open DJ sessions, visits from top artists and DJs and 20% of food concessions within the site will go to Hackney businesses.
Attendance is free for the event but a booking fee of £2.50 will be charged.
50% of tickets will be allocated to Hackney residents.
There is a two-step procedure for ticket allocation.
Applicants must be over 16 years of age by 23 June 2012 and must first register their details online including uploading a recent photo. Registration opens on Monday 6 February.
Once registered, applicants can then apply for tickets by phone or online starting on the 25th March.
Any new acts from East London interested in performing on the Introducing Stage can upload examples of their music at the BBC website.
All details of this exciting East London event are available at the special BBC Hackney Weekend website.