  We present an upgraded calculation of the effects of resonance-continuum
interference for the Higgs boson decaying to two photons at the Large Hadron
Collider, at next-to-leading order in the strong coupling $\alpha_S$,
$O(\alpha_S^3)$, and including transverse-momentum ($q_T$) resummation at
next-to-leading logarithmic accuracy. We study the importance of the
interference contribution in different transverse-momentum regions, with a
particular focus on the low $q_T$ region $q_T^2 << Q^2$ (with $Q^2$ being the
invariant diphoton mass) where resummation becomes essential for a reliable
calculation.
