Many extensions to the Standard Model predicts new particles decaying
into two massive vector bosons (WW, WZ, ZZ making this a smoking gun
signature. Searches for such diboson resonances have been performed in
final states with different numbers of leptons and jets where new jet
substructure techniques to disentangle the hadronic decay products in
highly boosted configuration are being used. This talk summaries ATLAS
searches for diboson resonances with LHC Run 2 data.