Recent measurements of top quark production in association with an additional boson are presented. The measurements are performed using the full Run 2 proton-proton collision data at a centre-of mass energy of 13 TeV collected with the ATLAS Experiment at the CERN Large Hadron Collider. The results comprise inclusive and differential measurements of top quark pair production with an additional gauge boson, the first observation of the single top quark production with a photon and the first measurements of top quark charge asymmetry in events with a pair of top quarks and a $W$ boson or a photon.