I Am Kloot, Nitin Sahwney and Taj Mahal have also signed up to perform at the event at Paddock Wood in Kent from June 29 - July 1.
Bob Dylan, Suede and Peter Gabriel are set to headline the annual festival, which will also see performances from the likes of Richard Ashcroft, Damien Rice, Primal Scream, My Morning Jacket, Maximo Park, Patti Smith and many more.
Meanwhile, Beady Eye have ruled themselves out of appearing at the event, after leaked lineup posters featured them on the longlist.
Liam Gallagher confirmed the reports, tweeting: "The mighty Beady Eye will not be performing at Hop Farm this year."
Sir Bruce Forsyth recently joined the lineup for his first ever festival appearance, where he will perform with his big band.
The lineup for Hop Farm 2012 so far is as follows:
Peter Gabriel And The New Blood Orchestra
My Morning Jacket
Patti Smith And Her Band
Dr John And The Lower 911
The Psychedelic Furs
Lianne La Havas
Kool and the Gang
George Clinton Parliament Funkadelic
Randy Crawford and Joe Sample Trio
British Sea Power
The Tallest Man on Earth
Peter Hook and the Light
I Am Kloot
Cashier No 9
James Levy and the Blood Red Rose
Benjamin Francis Leftwich
Dog Is Dead