Measurements of ttbar+X using the ATLAS detector

The large integrated luminosity provided by the LHC enables the production of a significant number of top-quark pairs in association with additional jets or additional gauge bosons. Analysis for all of these final states are presented here. The measurement of the production of top-quark pairs in association with W and Z bosons uses events with multiple leptons and in particular probes the coupling between the top quark and the Z boson. The production of top-quark pairs in association with additional light or heavy jets is an important background to searches for new physics.