Reading Festival organiser Melvin Benn and Festival Republic are in the process of asking Reading Borough Council if they can sell up to 6,500 more tickets over the next two years.
Festival bosses are also proposing to increase the number of “early arrivals” from 7,500 to 20,000.
Currently the festival sells 78,500 tickets with 4,999 guests and this year’s festival is completely sold out.
Reading Festival 2009 takes place from 28-30 August with Kings Of Leon, Arctic Monkeys and Radiohead.
Click here to see the full Reading Festival line-up.
It is not yet known whether extra camping provision will be made to coincide with this proposed increase in numbers.