Measurements of ${\rm t\bar{t}}$ + X with the ATLAS and CMS Experiments

Recent measurements of top quark pair production cross section in association with additional particles are presented. The results include measurements of differential cross sections for ${\rm t\bar{t}}$+jet processes as well as inclusive cross sections for ${\rm t\bar{t}}$ production in association with additional heavy-quark jets or additional bosons. The results are obtained by the ATLAS and CMS collaborations using data collected in proton-proton collisions at centre-of-mass energies of 7 TeV and 8 TeV.