Cult rockers Rilo Kiley are treating fans to a treasure trove of unreleased material, following their 2011 split.

Singer Jenny Lewis' rock group went their separate ways following a lengthy tour to promote their fourth and final full-length studio album, Under the Blacklight.

However, fans have one last release to look forward to - the band is putting out a new collection of unheard songs.

A post on their page states, "Record is almost finished, and artwork is nearly done. Going to need your help! More to come."

Guitarist Blake Sennett hinted about the project in 2011, telling, "I think we're going to try and release a two-disc set of 40 songs, or something... (It's) more considered like our last release, to me."