  We report on the computation of NLO QCD corrections to top-quark pair
production in association with two photons at the LHC. Higher-order effects and
photon bremsstrahlung are taken into account in the production and decays of
the top-quark pair. Top-quark and $W$-boson decays are treated in the Narrow
Width Approximation conserving spin correlations up to NLO in QCD. This is the
first time that the complete set of NLO QCD corrections to the $pp \to
t\bar{t}\gamma\gamma$ process including top-quark decays is calculated. We
present results at the integrated and differential cross-section level in the
di-lepton and lepton $+$ jet channel. In addition, we investigate the effect of
photon bremsstrahlung in $t\bar{t}$ production and top-quark decays, as well as
the mixed contribution. The latter contribution, in which two photons occur
simultaneously in the production and decay of the $t\bar{t}$ pair, proved to be
significant at both the integrated and differential cross-section level.
