At the LHC, the electroweak theory of the Standard Model of particle physics can be probed through either precision measurements of $W$ and $Z$ boson production or through gauge-boson self-interactions at high energy in multiboson processes. In these proceedings, recent measurements of the fundamental parameters of the electroweak theory, the coupling of the electroweak gauge bosons to fermions and measurements of multiboson production by the ATLAS, CMS and LHCb Collaborations are summarised. Many of these measurements exceed the precision achieved at previous collider experiments and significantly extend the energy reach.