  Top-quark pairs in association with final state particles are produced in
large quantities at the LHC due to the high centre-of-mass energy available in
proton-proton collisions. One such topology is that of a prompt photon radiated
from the top quark in addition to the final state particles from the top quark
decay. Using 36.1 fb$^{-1}$ of data collected at $\sqrt{s}$ = 13 TeV with the
ATLAS detector, fiducial cross-section results are shown in the single-lepton
and dilepton channels. Object-level and event-level neural networks are used to
increase sensitivity.
