  In this work we report on a next-to-leading order calculation of WW + jet
production at hadron colliders, with subsequent leptonic decays of the W-bosons
included. The calculation of the one-loop contributions is performed using
generalized unitarity methods in order to derive analytic expressions for the
relevant amplitudes. These amplitudes have been implemented in the parton-level
Monte Carlo generator MCFM, which we use to provide a complete next-to-leading
order calculation. Predictions for total cross-sections, as well as
differential distributions for several key observables, are computed both for
the LHC operating at 14 TeV as well as for a possible future 100 TeV
proton-proton collider.
