  We study the impact of parton correlations on the double Drell-Yan process,
i.e. on the production of two electroweak gauge bosons by double parton
scattering in a single proton-proton collision. Spin correlations between two
partons in a proton are shown to change the overall rate of the process and to
induce characteristic angular correlations between the decay leptons of the two
gauge bosons.
