We present the cross-section for the threshold production of the Higgs boson
at hadron-colliders at next-to-next-to-next-to-leading order (N3LO) in
perturbative QCD. We present an analytic expression for the partonic
cross-section at threshold and the impact of these corrections on the numerical
estimates for the hadronic cross-section at the LHC. With this result we
achieve a major milestone towards a complete evaluation of the cross-section at
N3LO which will reduce the theoretical uncertainty in the determination of the
strengths of the Higgs boson interactions.