Latitude fans on forums believe that The National, Paolo Nutini and Suede will headline this year's event with plenty of other names being bounded about as well.
A Drowned In Sound user said that Absolute Radio – a partner of the event – has had the bill on their forums for a while.
Foals, The Bees, Anna Calvi, Bright Eyes and KT Tunstall are among the rumours along with The Vaccines, Villagers, Wanda Jackson and Caribou.
Other acts rumoured include Everything Everything, Gold Panda, I Am Kloot, Thea Gilmore and Caitlin Rose.
Click here for the full list of Latitude rumours.
The first Latitude announcement is set to be announced tonight (Monday) at 7pm.
Check back for confirmations on who will be playing Latitude 2011, which will take place at Henham Park, Suffolk from 14-17 July.
Tickets will also be on sale from 7pm tonight.