Rapper and producer Timbaland has signed to Jay Z's Roc Nation label.

The big industry news broke on both Roc Nation's website and Jay Z's Life + Times blog; the announcement came with a photo of the rap heavyweights together in a recording studio.

At press time it is not clear what role Timbaland will have at Roc Nation. He has had producer credits on Jay Z's last eight albums and the pair recently collaborated on Justin Timberlake's comeback single Suit & Tie.