Associated production of top quarks at ATLAS and CMS

The latest measurements of the associated production of top quarks are summarised in this contribution, including the production of $t\bar{t}Z$, $t\bar{t}W$, $t\bar{t}\gamma/tq\gamma$ and $t\bar{t}t\bar{t}$. All measurements are in agreement with SM predictions. Sevaral measurements demonstrate tension with the prediction from theory computation or Monte Carlo generators, in particular in the measurement of the inclusive cross section of $t\bar{t}W$ by the CMS experiment.