Measurements of multiboson production at the LHC are important probes of the electroweak gauge structure of the Standard Model and can constrain anomalous gauge boson couplings. In these proceedings, measurements of triboson productions, $WZ\gamma$ and $W\gamma\gamma$ channels, by the ATLAS experiment at the LHC using 13 TeV dataset are reported. The measurement of $ZZ$ production cross-sections using 13.6 TeV dataset is also presented. Studies of gauge-boson polarisation and their correlation with $ZZ$ and $WZ$ events are also presented. In $WZ$ events, these studies have been extended to a phase space with high transverse momentum $Z$ bosons.